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/flynn/noise/hkdf.go

@@ -0,0 +1,49 @@
+package noise
+
+import (
+	"crypto/hmac"
+	"hash"
+)
+
+func hkdf(h func() hash.Hash, outputs int, out1, out2, out3, chainingKey, inputKeyMaterial []byte) ([]byte, []byte, []byte) {
+	if len(out1) > 0 {
+		panic("len(out1) > 0")
+	}
+	if len(out2) > 0 {
+		panic("len(out2) > 0")
+	}
+	if len(out3) > 0 {
+		panic("len(out3) > 0")
+	}
+	if outputs > 3 {
+		panic("outputs > 3")
+	}
+
+	tempMAC := hmac.New(h, chainingKey)
+	tempMAC.Write(inputKeyMaterial)
+	tempKey := tempMAC.Sum(out2)
+
+	out1MAC := hmac.New(h, tempKey)
+	out1MAC.Write([]byte{0x01})
+	out1 = out1MAC.Sum(out1)
+
+	if outputs == 1 {
+		return out1, nil, nil
+	}
+
+	out2MAC := hmac.New(h, tempKey)
+	out2MAC.Write(out1)
+	out2MAC.Write([]byte{0x02})
+	out2 = out2MAC.Sum(out2)
+
+	if outputs == 2 {
+		return out1, out2, nil
+	}
+
+	out3MAC := hmac.New(h, tempKey)
+	out3MAC.Write(out2)
+	out3MAC.Write([]byte{0x03})
+	out3 = out3MAC.Sum(out3)
+
+	return out1, out2, out3
+}