chore: release v1.0.2 with critical fixes and test improvements

- fix: add missing ClickHouse driver dependency
- fix: resolve race condition in orchestrator (single goroutine per source)
- feat: add explicit source_type config for Unix socket sources
- test: improve coverage from 50.6% to 62.0%
- docs: add CHANGELOG.md with release notes
- build: update version to 1.0.2 in build scripts and Dockerfiles

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

CHANGELOG.md

@@ -0,0 +1,78 @@
+# Changelog
+
+All notable changes to logcorrelator are documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [1.0.2] - 2026-02-28
+
+### Fixed
+
+- **Critical**: Added missing ClickHouse driver dependency (`github.com/ClickHouse/clickhouse-go/v2`)
+- **Critical**: Fixed race condition in orchestrator - reduced from two goroutines to one per source
+- **Security**: Added explicit `source_type` configuration for Unix socket sources to prevent source detection spoofing
+
+### Changed
+
+- Unix socket sources now support explicit `source_type` field in configuration:
+  - `"A"` or `"apache"` or `"http"` for Apache/HTTP logs
+  - `"B"` or `"network"` or `"net"` for network logs
+  - Empty string `""` for automatic detection (backward compatible)
+- Updated example configuration (`config.example.yml`) with `source_type` documentation
+
+### Added
+
+- Comprehensive test suite improvements:
+  - Added tests for source type detection (explicit + auto-detect fallback)
+  - Added tests for config validation (duplicate names/paths, empty fields, ClickHouse settings)
+  - Added tests for helper functions (`getString`, `getInt`, `getInt64`)
+  - Added tests for port validation in JSON parsing
+  - Added tests for MultiSink Flush/Close operations
+  - Added tests for FileSink path validation and file operations
+  - Added tests for CorrelationService buffer management and flush behavior
+- Test coverage improved from 50.6% to 62.0%
+- All tests now pass with race detector enabled
+
+### Technical Debt
+
+- Fixed unused variable in `TestCorrelationService_FlushWithEvents`
+- Added proper error handling for buffer overflow scenarios
+- Improved code documentation in configuration examples
+
+---
+
+## [1.0.1] - 2026-02-28
+
+### Added
+
+- Initial RPM packaging support for Rocky Linux 8/9 and AlmaLinux 10
+- Docker multi-stage build pipeline
+- Hexagonal architecture implementation
+- Unix socket input sources (JSON line protocol)
+- File output sink (JSON lines)
+- ClickHouse output sink with batching and retry logic
+- MultiSink for fan-out to multiple destinations
+- Time-window based correlation on `src_ip + src_port`
+- Graceful shutdown with signal handling (SIGINT, SIGTERM)
+- Configuration validation with sensible defaults
+- Basic observability (structured logging to stderr)
+
+### Configuration
+
+- YAML-based configuration file
+- Support for multiple Unix socket inputs
+- Configurable time window for correlation
+- Orphan event policy (Apache always emit, Network drop)
+- ClickHouse batch size, flush interval, and buffer configuration
+
+---
+
+## [1.0.0] - 2026-02-27
+
+### Added
+
+- Initial release
+- Core correlation engine
+- Basic HTTP and network log parsing
+- File-based output