feat(calls): consolidate agent identity via Ozonetel CDR

Ozonetel's webhook AgentName is a transfer-chain display string — same
display can collide (two agents both named "GlobalHealthX" with distinct
agent IDs), and chained like "RamaiahAdmin -> Ganesh Bandi -> GlobalHealthX".
Team Performance was bucketing every unique raw string as a separate
"agent", producing 7 rows for 3 real agents.

Fix — authoritative agent link via CDR AgentID (unique):

- New AgentLookupService (platform module): case-insensitive
  ozonetelAgentId → Agent UUID cache, shared across webhook / dispose /
  enrichment / backfill paths
- Webhook + outbound-dispose now persist UCID on Call so CDR can join
- Outbound dispose resolves agent relation at create time and overwrites
  from CDR AgentID post-hoc (catches dial transfers)
- New CdrEnrichmentService: every 30 min fetches today + yesterday CDR,
  patches Calls missing agentId / transferredTo / transferType by UCID
  join. Well under Ozonetel's 2 req/min cap.
- Historical backfill maint endpoint: /api/maint/enrich-call-agents
  with configurable day window (default 2, max 15). Rate-limited at 35s
  between dates.

Call schema additions (synced on Global + Ramaiah): agent relation,
ucid, transferredTo, transferType. agentName remains for legacy/display.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/ozonetel/cdr-enrichment.service.ts

@@ -0,0 +1,146 @@
+import { Injectable, Logger, OnModuleInit, OnModuleDestroy } from '@nestjs/common';
+import { OzonetelAgentService } from './ozonetel-agent.service';
+import { PlatformGraphqlService } from '../platform/platform-graphql.service';
+import { AgentLookupService } from '../platform/agent-lookup.service';
+
+/**
+ * Periodically pulls Ozonetel CDR (per-row, includes unique AgentID) and
+ * enriches Call records that were created from the missed-call webhook
+ * or outbound dispose without the authoritative agent relation.
+ *
+ * Runs every 30 minutes — well under Ozonetel's 2-req/min cap on the CDR
+ * endpoints (one fetch per workspace per tick = 2/hour).
+ *
+ * Pairs Call rows to CDR rows by `ucid`. Only patches Calls that are
+ * missing `agentId` / `transferredTo` / `transferType` — idempotent.
+ */
+const ENRICHMENT_INTERVAL_MS = 30 * 60 * 1000;
+const ENRICHMENT_DATE_WINDOW_DAYS = 2; // today + yesterday in case late-arriving calls straddle IST midnight
+
+@Injectable()
+export class CdrEnrichmentService implements OnModuleInit, OnModuleDestroy {
+    private readonly logger = new Logger(CdrEnrichmentService.name);
+    private timer: NodeJS.Timeout | null = null;
+
+    constructor(
+        private readonly ozonetel: OzonetelAgentService,
+        private readonly platform: PlatformGraphqlService,
+        private readonly agentLookup: AgentLookupService,
+    ) {}
+
+    async onModuleInit() {
+        // Kick off after 60s so the sidecar isn't hammering platform during boot,
+        // then settle into the 30-min cadence.
+        setTimeout(() => {
+            this.runOnce().catch((err) => {
+                this.logger.warn(`[CDR-ENRICH] First run failed: ${err?.message ?? err}`);
+            });
+        }, 60_000);
+        this.timer = setInterval(() => {
+            this.runOnce().catch((err) => {
+                this.logger.warn(`[CDR-ENRICH] Tick failed: ${err?.message ?? err}`);
+            });
+        }, ENRICHMENT_INTERVAL_MS);
+    }
+
+    onModuleDestroy() {
+        if (this.timer) clearInterval(this.timer);
+    }
+
+    async runOnce(): Promise<{ scanned: number; enriched: number; skipped: number }> {
+        let scanned = 0;
+        let enriched = 0;
+        let skipped = 0;
+
+        // Walk the IST-date window. For each date, pull CDR + patch Calls.
+        const dates = this.recentDatesIst(ENRICHMENT_DATE_WINDOW_DAYS);
+        for (const date of dates) {
+            const cdrRows = await this.ozonetel.fetchCDR({ date }).catch(() => []);
+            if (cdrRows.length === 0) continue;
+
+            // Build UCID → cdr-row map so we can O(1) join per Call.
+            const byUcid = new Map<string, any>();
+            for (const row of cdrRows) {
+                const ucid = String(row.UCID ?? '').trim();
+                if (ucid) byUcid.set(ucid, row);
+            }
+            if (byUcid.size === 0) continue;
+
+            // Pull Calls in the same date window that are missing agent linkage
+            // (i.e. ucid set, agentId null). Patch each.
+            const calls = await this.fetchCallsMissingAgent(date);
+            scanned += calls.length;
+
+            for (const call of calls) {
+                const cdrRow = byUcid.get(String(call.ucid).trim());
+                if (!cdrRow) { skipped++; continue; }
+
+                const patch: Record<string, any> = {};
+                const cdrAgentId = cdrRow.AgentID;
+                if (cdrAgentId && !call.agentId) {
+                    const uuid = await this.agentLookup.resolveByOzonetelId(cdrAgentId);
+                    if (uuid) patch.agentId = uuid;
+                    if (cdrRow.AgentName) patch.agentName = cdrRow.AgentName;
+                }
+                if (cdrRow.TransferredTo && !call.transferredTo) patch.transferredTo = cdrRow.TransferredTo;
+                if (cdrRow.TransferType && !call.transferType) patch.transferType = cdrRow.TransferType;
+
+                if (Object.keys(patch).length === 0) { skipped++; continue; }
+
+                try {
+                    await this.platform.query<any>(
+                        `mutation($id: UUID!, $data: CallUpdateInput!) { updateCall(id: $id, data: $data) { id } }`,
+                        { id: call.id, data: patch },
+                    );
+                    enriched++;
+                    await new Promise((r) => setTimeout(r, 50));
+                } catch (err: any) {
+                    this.logger.warn(`[CDR-ENRICH] Patch failed for ${call.id}: ${err?.message ?? err}`);
+                    skipped++;
+                }
+            }
+        }
+
+        if (scanned > 0 || enriched > 0) {
+            this.logger.log(`[CDR-ENRICH] Pass complete — dates=[${dates.join(',')}] scanned=${scanned} enriched=${enriched} skipped=${skipped}`);
+        }
+        return { scanned, enriched, skipped };
+    }
+
+    private async fetchCallsMissingAgent(date: string): Promise<Array<{ id: string; ucid: string | null; agentId: string | null; transferredTo: string | null; transferType: string | null }>> {
+        // Bound by IST day. CDR window is 15 days; we only ever need recent.
+        const gte = `${date}T00:00:00+05:30`;
+        const lte = `${date}T23:59:59+05:30`;
+        const results: Array<any> = [];
+        let after: string | null = null;
+
+        for (let page = 0; page < 20; page++) {
+            const cursorArg: string = after ? `, after: "${after}"` : '';
+            const data: any = await this.platform.query<any>(
+                `{ calls(first: 200${cursorArg}, filter: {
+                    startedAt: { gte: "${gte}", lte: "${lte}" },
+                    ucid: { is: NOT_NULL },
+                    agentId: { is: NULL }
+                }) {
+                    edges { node { id ucid agentId transferredTo transferType } }
+                    pageInfo { hasNextPage endCursor }
+                } }`,
+            ).catch(() => ({ calls: { edges: [], pageInfo: {} } }));
+            const edges = data?.calls?.edges ?? [];
+            for (const e of edges) results.push(e.node);
+            const pageInfo = data?.calls?.pageInfo ?? {};
+            if (!pageInfo.hasNextPage) break;
+            after = pageInfo.endCursor ?? null;
+        }
+        return results;
+    }
+
+    private recentDatesIst(n: number): string[] {
+        const dates: string[] = [];
+        for (let i = 0; i < n; i++) {
+            const d = new Date(Date.now() + 5.5 * 60 * 60 * 1000 - i * 24 * 60 * 60 * 1000);
+            dates.push(d.toISOString().slice(0, 10));
+        }
+        return dates;
+    }
+}