- Move `import traceback` to module level (was duplicated in 9 method bodies)
- Cache `_get_channel_databases()` result to avoid re-reading JSON files on every call
- `_get_all_streams()` now fetches `width`/`height` so dead-stream filtering needs no extra DB queries
- `_filter_working_streams()`: replace N individual ORM queries with one bulk `filter(id__in=...)` query
- `_sort_streams_by_quality()`: add explicit `prioritize_quality` parameter instead of hidden instance state
- `sort_streams_action()`: read and pass `prioritize_quality` from settings
- Extract `_parse_channel_file()` helper in fuzzy_matcher.py to eliminate duplicated parsing loop
- Simplify `REGIONAL_PATTERNS` — removed verbose `[Ee][Aa][Ss][Tt]` style since `re.IGNORECASE` is always applied
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
