feat(evals): stamp trial series identities and fit panels to the live registry

- scripts/eval-trial-series.ts stamps series_identity (eval-flake-rank's
  caseSeriesIdentities) on a report's trial-outcomes JSONL as its own step,
  keeping the history tool out of the paid runner's closure;
  TrialOutcomeRecord gains the optional series_identity field.
- Slice-count plans let a registered trial spill into an ordinary lane when
  its siblings hold every long lane, so panels never share a runner.
- Re-audited test-selection.ts (Stream B added the E2E_KINDS/BEHAVIOR_WHY
  map-diff; no new module loading) and repinned its hash.
- Detach and release floors now count trial shards (66 periodic trials in
  22 panels): periodic floor 33,821s, still under eval:bg:periodic's 67,380s.
- Coordination fixtures supply the executor's trial records.

test/paid-retry-supervision.test.ts

@@ -230,8 +230,8 @@ test('detached PR fallback and release commands cover their actual default worke
     )) / 1000 * 1.05));
   }
   const detachedReleaseWall = Number(scripts['eval:bg:release'].match(/--timeout (\d+)/)?.[1]) * 1000;
-  expect(releaseFloors).toEqual([21_725, 22_481]);
-  expect(releaseFloors.reduce((total, floor) => total + floor, 0)).toBe(44_206);
+  expect(releaseFloors).toEqual([21_725, 33_821]);
+  expect(releaseFloors.reduce((total, floor) => total + floor, 0)).toBe(55_546);
   expect(detachedReleaseWall).toBe(116_700_000);
   expect(detachedReleaseWall).toBeGreaterThanOrEqual(releaseWall + 120_000);
 });