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/core/correction_service.py

@@ -448,24 +448,24 @@ class CorrectionService:
             List of rule dictionaries with pattern, replacement, description
         """
         try:
-            conn = self.repository._get_connection()
-            cursor = conn.execute("""
-                SELECT pattern, replacement, description
-                FROM context_rules
-                WHERE is_active = 1
-                ORDER BY priority DESC
-            """)
+            with self.repository._pool.get_connection() as conn:
+                cursor = conn.execute("""
+                    SELECT pattern, replacement, description
+                    FROM context_rules
+                    WHERE is_active = 1
+                    ORDER BY priority DESC
+                """)
 
-            rules = []
-            for row in cursor.fetchall():
-                rules.append({
-                    "pattern": row[0],
-                    "replacement": row[1],
-                    "description": row[2]
-                })
+                rules = []
+                for row in cursor.fetchall():
+                    rules.append({
+                        "pattern": row[0],
+                        "replacement": row[1],
+                        "description": row[2]
+                    })
 
-            logger.debug(f"Loaded {len(rules)} context rules")
-            return rules
+                logger.debug(f"Loaded {len(rules)} context rules")
+                return rules
 
         except Exception as e:
             logger.error(f"Failed to load context rules: {e}")