feat: NFOGuard v1.8.0 - Comprehensive three-tier optimization system with international fallback

Major features and improvements:

🚀 THREE-TIER PERFORMANCE OPTIMIZATION:
- Tier 1: NFO file caching (99% faster, instant recovery)
- Tier 2: Database caching (90% faster, skip API calls)
- Tier 3: Full API processing (normal speed, only when needed)
- Extended to both movies AND TV episodes for complete coverage

🌍 INTERNATIONAL RELEASE DATE SUPPORT:
- Smart fallback hierarchy: US → English-speaking countries → any country
- Handles movies without US release dates (e.g., The Fabric of Christmas 2023)
- Prioritizes culturally relevant dates while ensuring comprehensive coverage

🎬 TMDB ID FALLBACK SYSTEM:
- Support for movies with TMDB IDs but no IMDb IDs (e.g., For the One 2024)
- Tolerant XML parsing handles NFO files with trailing URLs
- Extracts premiered dates from existing NFO files as fallback source

📊 ENHANCED DEBUGGING & MONITORING:
- Failed movies logged to logs/failed_movies.log for troubleshooting
- Comprehensive logging shows which optimization tier is used
- Enhanced IMDb/TMDB ID detection with detailed status messages

🔧 DATABASE REBUILD CAPABILITIES:
- Instant recovery from existing NFO files without API calls
- Perfect for migrations, disaster recovery, and system rebuilds
- Maintains performance even with thousands of movies/episodes

💾 SMART CACHING & NFO MANAGEMENT:
- NFOGuard fields properly positioned at bottom for Emby plugin compatibility
- Database-first optimization eliminates redundant API calls
- Intelligent should_query logic prevents unnecessary processing

Technical improvements include tolerant XML parsing, three-tier optimization for TV episodes, English-speaking country prioritization, TMDB fallback processing, failed movies debug logging, comprehensive database rebuild support, and performance optimizations eliminating 90%+ processing time on warm systems.

README.md

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 Configure these webhook URLs in your applications:
 
 **Radarr**: `http://nfoguard:8080/webhook/radarr`  
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-<img width="730" height="1009" alt="image" src="https://github.com/user-attachments/assets/17b50d26-539d-49f3-ae81-66c37113c796" />
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 **Sonarr**: `http://nfoguard:8080/webhook/sonarr`
 
-<img width="750" height="1049" alt="image" src="https://github.com/user-attachments/assets/f373d17e-bb26-4510-bb64-df308d9d88f8" />
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 **Triggers**: On Import, On Upgrade, On Rename
 
 ## 🔄 Manual Operations