Add muted_reasons_filter parameter to Bridge API post endpoints
Adds optional muted_reasons_filter parameter to all Bridge API functions that return posts:
- bridge.get_ranked_posts
- bridge.get_account_posts
- bridge.get_account_posts_by_tag
The parameter accepts an array of integers (0-4) representing muted reason bit positions. Posts with ANY of the specified muted reason bits set are filtered from results.
Key features:
- Filter applied in WHERE clause before LIMIT to maintain requested post count
- Efficient bitwise AND operations, no new indexes needed
- Fully backward compatible (optional parameter, defaults to NULL)
- Updated 32 utility functions across 8 SQL files