- Tighten chromadb dependency from >=0.4.0,<1 to >=0.5.0,<0.7
(the collection API changed significantly across majors; this
pins to the tested range)
- Add optional 'spellcheck' extras for the undeclared autocorrect
dependency used in spellcheck.py
- Add PEP 561 py.typed marker for type checker support
Findings: #10 (HIGH — chromadb range too wide), #30 (LOW — undeclared
autocorrect), #32 (LOW — missing py.typed)
Includes test infrastructure from PR #131.
92 tests pass.