Match ICD-10 codes regardless of which side has the dot

[anapaulagomes]

Summary

• _code_to_regex only tolerated a missing dot on the value side (definition code A90 matched value A90.1), never the reverse — a definition code written without the dot (A692, as some community definitions and NSSP/CCDD-style catalogs do) never matched a dotted value (A69.2), and vice versa.
• Both sides are now compared with the dot stripped, so A692, A69.2 and A69 all match A69.2 and A692 alike, regardless of which one carries the dot.

Test plan

• Added/updated tests/test_filter.py::TestCodeToRegex for both-direction dot matching, plus a case guarding against unrelated categories still being rejected.
• Updated the previous "exact code does not match extension" test, since a value with more digits is genuinely a real sub-code of the category (A90 matching A900 is correct once dot placement is no longer load-bearing).
• pytest — 240 passed, 15 skipped (pre-existing network-dependent skips).

🤖 Generated with Claude Code

https://claude.ai/code/session_01AsB13LEzvKquKxVGwghnoY