- Lower `SIMILARITY_THRESHOLD` to 0.68 and raise `MIN_SOURCES` to 3 for stricter story clustering.
- Expand `sources.txt` with new international and regional RSS feeds, including RT, The Jakarta Post, Philstar, and others.
- Add a new "Miscellaneous" section for diverse investigatory sources like The Intercept, OCCRP, and Bellingcat.

Add resources/excluded_phrases.txt (skip links, privacy/consent, legal
boilerplate) and match it case- and punctuation-insensitively as a
contiguous run of words. Phrases live in a data file so they can be
extended without touching code.

- Track source domain and publication time on each headline
- Cluster near-duplicate headlines into stories (union-find)
- Output stories covered by >=N distinct sources (--min-sources)
- Add --since/--until date window
- Ignore __pycache__ build artifacts