[aeppling]

important

Merge #1895 first

Summary

Every RTK filter that truncates output must give the agent a way to recover the hidden content. Before this PR, many truncation sites showed "… +N more" with no recovery path, and some that did have tee hints used bare magic offsets that would silently diverge if the cap changed.

This PR addresses two things:

1. Full tee/hint coverage : All truncation sites now emit either:

• force_tee_tail_hint for flat/homogeneous lists (one item = one line in the tee file), so the agent can tail -n +N directly to the first hidden item
• force_tee_hint for structured/multi-line blocks (test failures, build error blocks), where a line offset is meaningless

2. Safe caps via named constants :

• Every take(N) / > N / offset N+1 triplet is now derived from a single const MAX_XXX: usize = N, so changing the cap can't silently break the offset.

Bugs fixed

• format_compose_ps was teeing the raw tab-separated docker output (raw) while the offset pointed to formatted line 21. The agent would get unreadable tabs. Fixed by pre-building all formatted lines and teeing those.
• filter_cargo_test used force_tee_tail_hint with offset MAX_FAILURES + 1 on multi-line failure blocks , tail -n +11 would land mid-block. Switched to force_tee_hint.