feat: switch outbound dial to Kookoo API — outbound calls now work

- Replace CloudAgent V3 tbManualDial with Kookoo outbound.php
- Simple HTTP GET with api_key — no auth issues
- Kookoo callback endpoint: POST /webhooks/kookoo/callback
  - Creates Call record in platform
  - Matches caller to Lead by phone
- Remove agent login requirement before dial
- Tested: call queued successfully, phone rang

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

src/ozonetel/ozonetel-agent.controller.ts

@@ -64,16 +64,7 @@ export class OzonetelAgentController {
         this.logger.log(`Dial request: ${body.phoneNumber} (lead: ${body.leadId ?? 'none'})`);
 
         try {
-            // Ensure agent is logged in before dialing
-            await this.ozonetelAgent.loginAgent({
-                agentId: this.defaultAgentId,
-                password: this.defaultAgentPassword,
-                phoneNumber: this.defaultSipId,
-                mode: 'blended',
-            });
-
             const result = await this.ozonetelAgent.dialCustomer({
-                agentId: this.defaultAgentId,
                 customerNumber: body.phoneNumber,
             });
             return result;