Release v1.9.0: Add video-comparer skill and enhance transcript-fixer

## New Skill: video-comparer v1.0.0
- Compare original and compressed videos with interactive HTML reports
- Calculate quality metrics (PSNR, SSIM) for compression analysis
- Generate frame-by-frame visual comparisons (slider, side-by-side, grid)
- Extract video metadata (codec, resolution, bitrate, duration)
- Multi-platform FFmpeg support with security features

## transcript-fixer Enhancements
- Add async AI processor for parallel processing
- Add connection pool management for database operations
- Add concurrency manager and rate limiter
- Add audit log retention and database migrations
- Add health check and metrics monitoring
- Add comprehensive test suite (8 new test files)
- Enhance security with domain and path validators

## Marketplace Updates
- Update marketplace version from 1.8.0 to 1.9.0
- Update skills count from 15 to 16
- Update documentation (README.md, CLAUDE.md, CHANGELOG.md)

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

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

transcript-fixer/scripts/utils/__init__.py

@@ -4,13 +4,127 @@ Utils Module - Utility Functions and Tools
 This module contains utility functions:
 - diff_generator: Multi-format diff report generation
 - validation: Configuration validation
+- health_check: System health monitoring (P1-4 fix)
+- metrics: Metrics collection and monitoring (P1-7 fix)
+- rate_limiter: Production-grade rate limiting (P1-8 fix)
+- config: Centralized configuration management (P1-5 fix)
+- database_migration: Database migration system (P1-6 fix)
+- concurrency_manager: Concurrent request handling (P1-9 fix)
+- audit_log_retention: Audit log retention and compliance (P1-11 fix)
 """
 
 from .diff_generator import generate_full_report
 from .validation import validate_configuration, print_validation_summary
+from .health_check import HealthChecker, CheckLevel, HealthStatus, format_health_output
+from .metrics import get_metrics, format_metrics_summary, MetricsCollector
+from .rate_limiter import (
+    RateLimiter,
+    RateLimitConfig,
+    RateLimitStrategy,
+    RateLimitExceeded,
+    RateLimitPresets,
+    get_rate_limiter,
+)
+from .config import (
+    Config,
+    Environment,
+    DatabaseConfig,
+    APIConfig,
+    PathConfig,
+    get_config,
+    set_config,
+    reset_config,
+    create_example_config,
+)
+from .database_migration import (
+    DatabaseMigrationManager,
+    Migration,
+    MigrationRecord,
+    MigrationDirection,
+    MigrationStatus,
+)
+from .migrations import (
+    MIGRATION_REGISTRY,
+    LATEST_VERSION,
+    get_migration,
+    get_migrations_up_to,
+    get_migrations_from,
+)
+from .db_migrations_cli import create_migration_cli
+from .concurrency_manager import (
+    ConcurrencyManager,
+    ConcurrencyConfig,
+    ConcurrencyMetrics,
+    CircuitState,
+    BackpressureError,
+    CircuitBreakerOpenError,
+    get_concurrency_manager,
+    reset_concurrency_manager,
+)
+from .audit_log_retention import (
+    AuditLogRetentionManager,
+    RetentionPolicy,
+    RetentionPeriod,
+    CleanupStrategy,
+    CleanupResult,
+    ComplianceReport,
+    CRITICAL_ACTIONS,
+    get_retention_manager,
+    reset_retention_manager,
+)
 
 __all__ = [
     'generate_full_report',
     'validate_configuration',
     'print_validation_summary',
+    'HealthChecker',
+    'CheckLevel',
+    'HealthStatus',
+    'format_health_output',
+    'get_metrics',
+    'format_metrics_summary',
+    'MetricsCollector',
+    'RateLimiter',
+    'RateLimitConfig',
+    'RateLimitStrategy',
+    'RateLimitExceeded',
+    'RateLimitPresets',
+    'get_rate_limiter',
+    'Config',
+    'Environment',
+    'DatabaseConfig',
+    'APIConfig',
+    'PathConfig',
+    'get_config',
+    'set_config',
+    'reset_config',
+    'create_example_config',
+    'DatabaseMigrationManager',
+    'Migration',
+    'MigrationRecord',
+    'MigrationDirection',
+    'MigrationStatus',
+    'MIGRATION_REGISTRY',
+    'LATEST_VERSION',
+    'get_migration',
+    'get_migrations_up_to',
+    'get_migrations_from',
+    'create_migration_cli',
+    'ConcurrencyManager',
+    'ConcurrencyConfig',
+    'ConcurrencyMetrics',
+    'CircuitState',
+    'BackpressureError',
+    'CircuitBreakerOpenError',
+    'get_concurrency_manager',
+    'reset_concurrency_manager',
+    'AuditLogRetentionManager',
+    'RetentionPolicy',
+    'RetentionPeriod',
+    'CleanupStrategy',
+    'CleanupResult',
+    'ComplianceReport',
+    'CRITICAL_ACTIONS',
+    'get_retention_manager',
+    'reset_retention_manager',
 ]