fix: camelCase field names + dial uses per-agent config

Defect 5: Worklist, missed-call-webhook, missed-queue, ai-chat, and
rules-engine all used legacy lowercase field names (callbackstatus,
callsourcenumber, missedcallcount, callbackattemptedat) from the old
VPS schema. Fixed to camelCase (callbackStatus, callSourceNumber,
missedCallCount, callbackAttemptedAt) matching the current SDK sync.

Defect 6: Dial endpoint used global defaults (OZONETEL_AGENT_ID env
var) instead of the logged-in agent's config. Now accepts agentId
and campaignName from the frontend request body. Falls back to
telephony config → DID-derived campaign name → explicit error.

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

src/rules-engine/facts/call-facts.provider.ts

@@ -18,10 +18,10 @@ export class CallFactsProvider implements FactProvider {
             'call.status': call.callStatus ?? null,
             'call.disposition': call.disposition ?? null,
             'call.durationSeconds': call.durationSeconds ?? call.durationSec ?? 0,
-            'call.callbackStatus': call.callbackstatus ?? call.callbackStatus ?? null,
+            'call.callbackStatus': call.callbackStatus ?? call.callbackStatus ?? null,
             'call.slaElapsedPercent': slaElapsedPercent,
             'call.slaBreached': slaElapsedPercent > 100,
-            'call.missedCount': call.missedcallcount ?? call.missedCount ?? 0,
+            'call.missedCount': call.missedCallCount ?? call.missedCount ?? 0,
             'call.taskType': taskType,
         };
     }