Unanchored 'models/' in .gitignore silently ignores src/models additions

[bradsmithmba]

Summary

.gitignore line 168 has an unanchored rule:

models/

An unanchored directory pattern matches a directory of that name at every level, so it matches src/models/ as well as the intended root-level models/ artifact directory. Any module added under src/models/ is silently ignored by git and never committed.

This is the same class of bug as the data/ rule fixed in #1 (PR anchors it to /data/). The older src/models/ files (regime_detector.py, scoring_engine.py, etc.) predate the rule and remained tracked, which masks the problem.

Impact

• New modules placed under src/models/ will not be picked up by git add and will appear "missing" to anyone who clones the repo.
• This is the mechanism that would re-hide src/models/integrated_selector.py (see separate issue) if it were created.

Reproduction

$ git check-ignore -v src/models/integrated_selector.py
.gitignore:168:models/	src/models/integrated_selector.py

Fix

Anchor the rule to the repository root:

/models/

This still ignores the root-level models/ artifact directory but no longer matches src/models/. The same review should be applied to the other unanchored project-specific rules (logs/, checkpoints/) for the same reason.