fix(.gitignore): align logging managed block with setup.conf (#115)

[ycpss91255]

Summary

Closes #115. Fixes the stale /logs/ entry in the [logging] local_path managed marker block of .gitignore.

PR #114 upgraded .base to v0.34.0 and flipped [logging] local_path
from ./logs/ to ./log/ in config/docker/setup.conf, but the
managed block in .gitignore was not updated because setup.sh apply
did not run after the config change. The v0.34.0 prune mechanism
(base#390) would have fixed this on the next wrapper invocation, but
the stale entry persisted in the meantime.

Audit findings (issue #115)

Full audit of .gitignore against base's canonical output:

• All 8 canonical entries present and correct.
• No tracked files that should be untracked.
• Repo-specific entries (bridge.yaml, .claude, CLAUDE.md) valid.
• Only finding: /logs/ stale in managed block (fixed by this PR).

Test plan

• Single-line .gitignore change: /logs/ -> /log/.
• CI green (ci-summary aggregator).

Context

The root cause (two-source gitignore lifecycle: init/upgrade vs
runtime) is tracked in ycpss91255-docker/base#402.