feat(sidecar): Ozonetel admin auth service — RSA login, JWT cache

- Node crypto RSA encryption (not jsencrypt — server-side)
- Pre-login public key fetch, encrypted login, JWT caching
- Auto-refresh before token expiry (decoded from JWT payload)
- Auth headers: Bearer token + userId + userName + isSuperAdmin
- Registered in SupervisorModule with ConfigThemeModule import

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

src/ozonetel/ozonetel-admin-auth.service.ts

@@ -0,0 +1,123 @@
+import { Injectable, Logger, OnModuleInit } from '@nestjs/common';
+import { publicEncrypt, constants as cryptoConstants } from 'crypto';
+import axios from 'axios';
+import { TelephonyConfigService } from '../config/telephony-config.service';
+
+// Ozonetel admin API auth — login with RSA-encrypted credentials, cache JWT.
+// Used by supervisor barge endpoints to call dashboardApi.
+//
+// Auth flow (from CA-Admin source code):
+// 1. GET /api/auth/public-key → { publicKey, keyId }
+// 2. RSA-encrypt username + password with publicKey
+// 3. POST /auth/login → JWT token
+// 4. All admin API calls use: Authorization: Bearer <jwt>, userId, userName, isSuperAdmin
+
+@Injectable()
+export class OzonetelAdminAuthService implements OnModuleInit {
+    private readonly logger = new Logger(OzonetelAdminAuthService.name);
+    private cachedToken: string | null = null;
+    private cachedUserId: string | null = null;
+    private cachedUserName: string | null = null;
+    private tokenExpiresAt = 0;
+
+    constructor(private readonly telephony: TelephonyConfigService) {}
+
+    async onModuleInit() {
+        const config = this.telephony.getConfig();
+        if (config.ozonetel.adminUsername && config.ozonetel.adminPassword) {
+            this.logger.log('Ozonetel admin credentials configured — will authenticate on first use');
+        } else {
+            this.logger.warn('Ozonetel admin credentials not configured — supervisor barge will be unavailable');
+        }
+    }
+
+    private get apiBase(): string {
+        return 'https://api.cloudagent.ozonetel.com';
+    }
+
+    async getAuthHeaders(): Promise<Record<string, string>> {
+        const token = await this.getToken();
+        return {
+            'Content-Type': 'application/json',
+            'Authorization': `Bearer ${token}`,
+            'userId': this.cachedUserId ?? '',
+            'userName': this.cachedUserName ?? '',
+            'isSuperAdmin': 'true',
+            'dAccessType': 'false',
+        };
+    }
+
+    async getToken(): Promise<string> {
+        if (this.cachedToken && Date.now() < this.tokenExpiresAt) {
+            return this.cachedToken;
+        }
+        return this.login();
+    }
+
+    private rsaEncrypt(publicKeyPem: string, plaintext: string): string {
+        const buffer = Buffer.from(plaintext, 'utf8');
+        const encrypted = publicEncrypt(
+            { key: publicKeyPem, padding: cryptoConstants.RSA_PKCS1_PADDING },
+            buffer,
+        );
+        return encrypted.toString('base64');
+    }
+
+    private async login(): Promise<string> {
+        const config = this.telephony.getConfig();
+        const { adminUsername, adminPassword } = config.ozonetel;
+
+        if (!adminUsername || !adminPassword) {
+            throw new Error('Ozonetel admin credentials not configured');
+        }
+
+        // Step 1: Get RSA public key
+        this.logger.log('Fetching Ozonetel public key...');
+        const preLoginRes = await axios.get(`${this.apiBase}/api/auth/public-key`);
+        const { publicKey, keyId } = preLoginRes.data;
+
+        if (!publicKey || !keyId) {
+            throw new Error('Failed to get Ozonetel public key');
+        }
+
+        // Step 2: RSA-encrypt credentials using Node crypto
+        const encryptedUsername = this.rsaEncrypt(publicKey, adminUsername);
+        const encryptedPassword = this.rsaEncrypt(publicKey, adminPassword);
+
+        // Step 3: Login
+        this.logger.log('Logging into Ozonetel admin portal...');
+        const loginRes = await axios.post(`${this.apiBase}/auth/login`, {
+            username: encryptedUsername,
+            password: encryptedPassword,
+            keyId,
+            ltype: 'PORTAL',
+        }, {
+            headers: { 'Content-Type': 'application/json' },
+        });
+
+        const data = loginRes.data;
+        if (!data.token) {
+            throw new Error(`Ozonetel admin login failed: ${JSON.stringify(data)}`);
+        }
+
+        this.cachedToken = data.token;
+        this.cachedUserId = data.userId?.toString() ?? data.UserId?.toString() ?? '';
+        this.cachedUserName = data.name ?? adminUsername;
+
+        // Decode token expiry — fallback to 6 hours
+        try {
+            const payload = JSON.parse(Buffer.from(data.token.split('.')[1], 'base64').toString());
+            this.tokenExpiresAt = (payload.exp ?? 0) * 1000 - 60_000; // refresh 1 min early
+        } catch {
+            this.tokenExpiresAt = Date.now() + 6 * 60 * 60 * 1000;
+        }
+
+        this.logger.log(`Ozonetel admin login successful (userId=${this.cachedUserId}, expires in ${Math.round((this.tokenExpiresAt - Date.now()) / 60000)}min)`);
+        return this.cachedToken;
+    }
+
+    isConfigured(): boolean {
+        const config = this.telephony.getConfig();
+        return !!(config.ozonetel.adminUsername && config.ozonetel.adminPassword);
+    }
+}