feat: Implement v1.1.1 Phase 1 - Core Infrastructure

Phase 1 of v1.1.1 "Polish" release focusing on production readiness.
Implements logging, connection pooling, validation, and error handling.

Following specs in docs/design/v1.1.1/developer-qa.md and ADRs 052-055.

**Structured Logging** (Q3, ADR-054)
- RotatingFileHandler (10MB files, keep 10)
- Correlation IDs for request tracing
- All print statements replaced with logging
- Context-aware correlation IDs (init/request)
- Logs written to data/logs/starpunk.log

**Database Connection Pooling** (Q2, ADR-053)
- Connection pool with configurable size (default: 5)
- Request-scoped connections via Flask g object
- Pool statistics for monitoring
- WAL mode enabled for concurrency
- Backward compatible get_db() signature

**Configuration Validation** (Q14, ADR-052)
- Validates presence and type of all config values
- Fail-fast startup with clear error messages
- LOG_LEVEL enum validation
- Type checking for strings, integers, paths
- Non-zero exit status on errors

**Centralized Error Handling** (Q4, ADR-055)
- Moved handlers to starpunk/errors.py
- Micropub spec-compliant JSON errors
- HTML templates for browser requests
- All errors logged with correlation IDs
- MicropubError exception class

**Database Module Reorganization**
- Moved database.py to database/ package
- Separated init.py, pool.py, schema.py
- Maintains backward compatibility
- Cleaner separation of concerns

**Testing**
- 580 tests passing
- 1 pre-existing flaky test noted
- No breaking changes to public API

**Documentation**
- CHANGELOG.md updated with v1.1.1 entry
- Version bumped to 1.1.1
- Implementation report in docs/reports/

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

Co-Authored-By: Claude <noreply@anthropic.com>

CHANGELOG.md

@@ -7,6 +7,52 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.1.1] - 2025-11-25
+
+### Added
+- **Structured Logging** - Enhanced logging system for production readiness
+  - RotatingFileHandler with 10MB files, keeping 10 backups
+  - Correlation IDs for request tracing across the entire request lifecycle
+  - Separate log files in `data/logs/starpunk.log`
+  - All print statements replaced with proper logging
+  - See ADR-054 for architecture details
+
+- **Database Connection Pooling** - Improved database performance
+  - Connection pool with configurable size (default: 5 connections)
+  - Request-scoped connections via Flask's g object
+  - Pool statistics available for monitoring via `/admin/metrics`
+  - Transparent to calling code (maintains same interface)
+  - See ADR-053 for implementation details
+
+- **Enhanced Configuration Validation** - Fail-fast startup validation
+  - Validates both presence and type of all required configuration values
+  - Clear, detailed error messages with specific fixes
+  - Validates LOG_LEVEL against allowed values
+  - Type checking for strings, integers, and Path objects
+  - Non-zero exit status on configuration errors
+  - See ADR-052 for configuration strategy
+
+### Changed
+- **Centralized Error Handling** - Consistent error responses
+  - Moved error handlers from inline decorators to `starpunk/errors.py`
+  - Micropub endpoints return spec-compliant JSON errors
+  - HTML error pages for browser requests
+  - All errors logged with correlation IDs
+  - MicropubError exception class for spec compliance
+  - See ADR-055 for error handling strategy
+
+- **Database Module Reorganization** - Better structure
+  - Moved from single `database.py` to `database/` package
+  - Separated concerns: `init.py`, `pool.py`, `schema.py`
+  - Maintains backward compatibility with existing imports
+  - Cleaner separation of initialization and connection management
+
+### Technical Details
+- Phase 1 of v1.1.1 "Polish" release
+- Core infrastructure improvements for production readiness
+- 580 tests passing
+- No breaking changes to public API
+
 ## [1.1.0] - 2025-11-25
 
 ### Added