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/bleve/v2/index/upsidedown/stats.go

@@ -0,0 +1,55 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package upsidedown
+
+import (
+	"sync/atomic"
+
+	"github.com/blevesearch/bleve/v2/util"
+	"github.com/blevesearch/upsidedown_store_api"
+)
+
+type indexStat struct {
+	updates, deletes, batches, errors uint64
+	analysisTime, indexTime           uint64
+	termSearchersStarted              uint64
+	termSearchersFinished             uint64
+	numPlainTextBytesIndexed          uint64
+	i                                 *UpsideDownCouch
+}
+
+func (i *indexStat) statsMap() map[string]interface{} {
+	m := map[string]interface{}{}
+	m["updates"] = atomic.LoadUint64(&i.updates)
+	m["deletes"] = atomic.LoadUint64(&i.deletes)
+	m["batches"] = atomic.LoadUint64(&i.batches)
+	m["errors"] = atomic.LoadUint64(&i.errors)
+	m["analysis_time"] = atomic.LoadUint64(&i.analysisTime)
+	m["index_time"] = atomic.LoadUint64(&i.indexTime)
+	m["term_searchers_started"] = atomic.LoadUint64(&i.termSearchersStarted)
+	m["term_searchers_finished"] = atomic.LoadUint64(&i.termSearchersFinished)
+	m["num_plain_text_bytes_indexed"] = atomic.LoadUint64(&i.numPlainTextBytesIndexed)
+
+	if o, ok := i.i.store.(store.KVStoreStats); ok {
+		m["kv"] = o.StatsMap()
+	}
+
+	return m
+}
+
+func (i *indexStat) MarshalJSON() ([]byte, error) {
+	m := i.statsMap()
+	return util.MarshalJSON(m)
+}