fix(v4.3): obligations.py — bug report fixes (10 issues)

🔧 v4.2: Critical bug fixes + performance optimizations (7 bugs, 4 perf improvements) (#3)

v3.1: Fix 7-8 — party attribution scoped to sentence, reject >40 char strings

v3.0: Upload actual obligations.py content

v3.0: Fix obligation tracker - reduce false positives, add priority scoring

Upload obligations.py