Refactors the Bilibili keyword search functionality to provide more flexible crawling strategies and corrects a flaw in how crawl limits were applied.
Previously, the `ALL_DAY` boolean flag offered a rigid choice for time-based searching and contained a logical issue where `CRAWLER_MAX_NOTES_COUNT` was incorrectly applied on a per-day basis instead of as an overall total.
This commit introduces the `BILI_SEARCH_MODE` configuration option with three distinct modes:
- `normal`: The default search behavior without time constraints.
- `all_in_time_range`: Maximizes data collection within a specified date range, replicating the original intent of `ALL_DAY=True`.
- `daily_limit_in_time_range`: A new mode that strictly enforces both the daily `MAX_NOTES_PER_DAY` and the total `CRAWLER_MAX_NOTES_COUNT` limits across the entire date range.
This change resolves the limit logic bug and gives users more precise control over the crawling process.
Changes include:
- Modified `config/base_config.py` to replace `ALL_DAY` with `BILI_SEARCH_MODE`.
- Refactored `media_platform/bilibili/core.py` to implement the new search mode logic.
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