release: Version 1.15.0 with advanced streaming serialization and feature flags

- Bump version to 1.15.0 across workspace
- Finalize CHANGELOG with comprehensive feature documentation
- Advanced streaming serialization formats (MessagePack, Avro, Protobuf)
- Complete feature flag implementation for selective streaming functionality
- Enhanced serialization testing with comprehensive validation

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: CodingAnarchy

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.15.0] - 2025-01-17
+
 ### Added
 - **📦 Advanced Streaming Serialization Formats**
   - Implemented MessagePack serialization using `rmp-serde` for compact binary JSON-like format
@@ -15,6 +17,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   - All advanced serialization formats are feature-gated under the `streaming` feature flag
   - Graceful degradation with helpful error messages when streaming feature is not enabled
   - Comprehensive schema definitions for JobLifecycleEvent in both Avro and Protobuf formats
+- **🔧 Comprehensive Streaming Feature Flag Implementation**
+  - Complete feature-gating of streaming module behind `streaming`/`kafka`/`google-pubsub`/`kinesis` features
+  - Selective compilation of streaming functionality to reduce dependencies when not needed
+  - Proper conditional exports and configuration structs with feature boundary respect
+  - Integration tests properly isolated based on feature availability
+- **🧪 Enhanced Serialization Testing**
+  - Comprehensive test coverage for all serialization formats with round-trip validation
+  - Binary format validation and size efficiency testing
+  - Feature flag enforcement testing with proper error handling
+  - Cross-format performance comparison testing
 - **📡 Kafka Streaming Integration**
   - Added real Apache Kafka integration with `kafka` feature flag using `rdkafka` crate
   - Implemented production-ready `KafkaProcessor` with real Kafka producer functionality

Cargo.toml

@@ -9,7 +9,7 @@ members = [
 resolver = "2"
 
 [workspace.package]
-version = "1.14.0"
+version = "1.15.0"
 edition = "2024"
 license = "MIT"
 repository = "https://github.com/CodingAnarchy/hammerwork"
@@ -19,7 +19,7 @@ documentation = "https://docs.rs/hammerwork"
 rust-version = "1.86"
 
 [workspace.dependencies]
-hammerwork = { version = "1.14.0", path = "." }
+hammerwork = { version = "1.15.0", path = "." }
 tokio = { version = "1.0", features = ["full"] }
 sqlx = { version = "0.8", features = ["runtime-tokio-rustls", "chrono", "uuid", "json"] }
 chrono = { version = "0.4", features = ["serde"] }