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/marten-seemann/tcp/sys.go

@@ -0,0 +1,39 @@
+// Copyright 2016 Mikio Hara. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package tcp
+
+import (
+	"encoding/binary"
+	"unsafe"
+)
+
+var nativeEndian binary.ByteOrder
+
+func init() {
+	i := uint32(1)
+	b := (*[4]byte)(unsafe.Pointer(&i))
+	if b[0] == 1 {
+		nativeEndian = binary.LittleEndian
+	} else {
+		nativeEndian = binary.BigEndian
+	}
+}
+
+const (
+	ianaProtocolIP   = 0x0
+	ianaProtocolTCP  = 0x6
+	ianaProtocolIPv6 = 0x29
+)
+
+const (
+	soBuffered = iota
+	soAvailable
+	soMax
+)
+
+type option struct {
+	level int // option level
+	name  int // option name, must be equal or greater than 1
+}