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/ipld/go-ipld-prime/node/mixins/delim.go

@@ -0,0 +1,40 @@
+package mixins
+
+// This file is a little different than most of its siblings in this package.
+// It's not really much of a "mixin".  More of a util function junkdrawer.
+//
+// Implementations of Data Model Nodes are unlikely to need these.
+// Implementations of Schema-level Node *are* likely to need these, however.
+//
+// Our codegen implementation emits calls to these functions.
+// (And having these functions in a package that's already an unconditional
+// import in files emitted by codegen makes the codegen significantly simpler.)
+
+import (
+	"fmt"
+	"strings"
+)
+
+// SplitExact is much like strings.Split but will error if the number of
+// substrings is other than the expected count.
+//
+// SplitExact is used by the 'stringjoin' representation for structs.
+//
+// The 'count' parameter is a length.  In other words, if you expect
+// the zero'th index to be present in the result, you should ask for
+// a count of at least '1'.
+// Using this function with 'count' less than 2 is rather strange.
+func SplitExact(s string, sep string, count int) ([]string, error) {
+	ss := strings.Split(s, sep)
+	if len(ss) != count {
+		return nil, fmt.Errorf("expected %d instances of the delimiter, found %d", count-1, len(ss)-1)
+	}
+	return ss, nil
+}
+
+// SplitN is an alias of strings.SplitN, which is only present here to
+// make it usable in codegen packages without requiring conditional imports
+// in the generation process.
+func SplitN(s, sep string, n int) []string {
+	return strings.SplitN(s, sep, n)
+}