fix(quality): register new serial timing tests + prune stale any-suppression count

- stryker.conf.json: add tests/unit/serial/combo-quota-share-cooldown-wait-timing.test.ts
  and tests/unit/serial/combo-strategy-fallbacks-half-open-timing.test.ts to
  tap.testFiles so their mutant kills count for accountFallback.ts and
  circuitBreaker.ts (PR #6897 added these files but didn't register them).
- eslint-suppressions.json: combo-strategy-fallbacks.test.ts's no-explicit-any
  suppression count was stale (35) after this PR trimmed 2 any-usages out of
  the file when extracting the half-open timing test; corrected to 33.

Co-authored-by: Diego Rodrigues de Sa e Souza <souzamiriamrodrigues790@gmail.com>

config/quality/eslint-suppressions.json

@@ -1059,7 +1059,7 @@
   },
   "tests/unit/combo-strategy-fallbacks.test.ts": {
     "@typescript-eslint/no-explicit-any": {
-      "count": 35
+      "count": 33
     }
   },
   "tests/unit/combo-stream-readiness-fallback.test.ts": {

stryker.conf.json

@@ -223,6 +223,8 @@
       "tests/unit/route-guard-provider-login-local-only.test.ts",
       "tests/unit/router-strategies.test.ts",
       "tests/unit/serial/combo-health-autopilot.test.ts",
+      "tests/unit/serial/combo-quota-share-cooldown-wait-timing.test.ts",
+      "tests/unit/serial/combo-strategy-fallbacks-half-open-timing.test.ts",
       "tests/unit/serial/provider-health-autopilot.test.ts",
       "tests/unit/service-combo-metrics.test.ts",
       "tests/unit/services-branch-hardening.test.ts",