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/blevesearch/snowballstem/among.go

@@ -0,0 +1,16 @@
+package snowballstem
+
+import "fmt"
+
+type AmongF func(env *Env, ctx interface{}) bool
+
+type Among struct {
+	Str string
+	A   int32
+	B   int32
+	F   AmongF
+}
+
+func (a *Among) String() string {
+	return fmt.Sprintf("str: `%s`, a: %d, b: %d, f: %p", a.Str, a.A, a.B, a.F)
+}