[kvlonge]

Why

#782 made the fresh-process cache guards macro-rich, with provisional limits. Its CI run now gives measured runner times. The provisional limits allowed up to 1.7x those times, enough headroom to hide a real regression.

Changes

Limits are set to about 1.25x the slowest CI time for each phase on #782:

Models	Cold	Warm	Edit
3000	14s → 12.5s	8s → 6.5s	7.5s → 6s
5000	23s → 24s	14s (kept)	13.5s → 12.5s
10000	46.5s → 37.5s	27s → 20s	24.5s → 18s

CI slowest times:

• 3000: cold/config 10.08s, warm 5.30s, edit 4.88s.
• 5000: cold/config 19.35s, warm 11.14s, edit 9.84s.
• 10000: cold/config 30.13s, warm 15.98s, edit 14.55s.

The 5000-model cold limit rises from 23s to 24s: at 23s its project-config edit had only 1.19x headroom. The 0.67 warm-to-cold ratio guard is unchanged (CI measured 0.54–0.58).

Verification

• ruff format --check and ruff check pass on the changed file.
• This PR's cache-compile CI jobs exercise the new limits.