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-free-boundary.test.ts

@@ -27,7 +27,7 @@ function runnerDependencies(root: string, entries: string[]): string[] {
     const source = fs.readFileSync(file, 'utf8').replace(/^#![^\n]*(?:\n|$)/, '\n');
     let audited = source;
     if (relative === 'test/helpers/test-selection.ts') {
-      if (createHash('sha256').update(source).digest('hex') !== '4d2fbcb6249e8d22453d25bfe9b18ee0f4568bbec071918675c38a455d4e1e08') {
+      if (createHash('sha256').update(source).digest('hex') !== '052ad5a52472bcb41db04c9f21fe6a819e9547768468f7e5d390e0014b567677') {
         throw new Error('Re-audit the historical touchfile map loader before excluding its computed import');
       }
       audited = source.replace('`const m = await import(${JSON.stringify(dataPath)});`,', "'',");