Integrate BACKBEAT SDK and resolve KACHING license validation

Major integrations and fixes:
- Added BACKBEAT SDK integration for P2P operation timing
- Implemented beat-aware status tracking for distributed operations
- Added Docker secrets support for secure license management
- Resolved KACHING license validation via HTTPS/TLS
- Updated docker-compose configuration for clean stack deployment
- Disabled rollback policies to prevent deployment failures
- Added license credential storage (CHORUS-DEV-MULTI-001)

Technical improvements:
- BACKBEAT P2P operation tracking with phase management
- Enhanced configuration system with file-based secrets
- Improved error handling for license validation
- Clean separation of KACHING and CHORUS deployment stacks

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

vendor/github.com/nats-io/nats.go/.golangci.yaml

@@ -0,0 +1,16 @@
+issues:
+  max-issues-per-linter: 0
+  max-same-issues: 0
+  exclude-rules:
+    - linters:
+      - errcheck
+      text: "Unsubscribe"
+    - linters:
+      - errcheck
+      text: "Drain"
+    - linters:
+      - errcheck
+      text: "msg.Ack"
+    - linters:
+      - errcheck
+      text: "watcher.Stop"