feat(routing): every eval case names its event; the P10 eval gate is exempted with its reason (A1)

P10's model-free part (wave 4, order A1, decision 63). The routing test now
checks every case in evals/ for from=, not only the skill-tagged ones (R1):
a case with no skill tag is not routed, only checked, and the report gives
both counts ("45 cases checked for from=, 37 routed"). The eight test-set
cases get from=proevesett-eval-suite (d311f3b) or
from=proevesett-intent-gate (3892a83), the commits that added them.

The release gate that reads the last test-set run is written into the
runbook as exempted with its reason (it waits for the fixed test set to run
again) and still says where it goes (scripts/release-check.mjs).

review-630's prototype-tag stub gets from=test: under R1 an unrouted case is
still checked for from=, and the stub tests that a prototype name is never
routed, which stands.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

evals/plan-project-not-initialized/prompt.md

@@ -1,7 +1,7 @@
 ---
 description: "/trekplan --project on a missing folder stops before any exploration."
 expected_outcome: "'Error: project directory not initialized. Run /trekbrief to create it.'; no Agent call, no plan.md."
-tags: [proevesett]
+tags: [proevesett, from=proevesett-eval-suite]
 runs: 1
 max_turns: 8
 timeout_seconds: 300