feat(seasonpass): bump mainnet image to git-ba5228c (cap anyio threadpool, fix QueuePool 500 alarms)

Deploys the threadpool cap from NineChronicles.SeasonPass#306. The DB pool
(10+20=30) was smaller than the anyio threadpool (40) running sync handlers, so
traffic bursts exhausted the pool -> HTTP 500 (QueuePool timeout) on all DB
endpoints -> the Assertible block-status + invalid-claim monitors paged together
(and /api/season-pass/current degraded). Capping the threadpool to 25 (<30) makes
bursts queue instead of 500.

Previous image git-cc9e3f8 (async /ping) stopped the pod restart loop but not the
pool exhaustion; this completes the fix. postgres is healthy (instant connects,
tx-tracker unaffected) -- API-side capacity mismatch only.

Shared seasonpass.image.tag, so all components restart, but the code delta vs
git-cc9e3f8 is only apps/api (main.py, config.py). Images verified present for
api/tracker/worker.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: ipdae

9c-main/external-services/values.yaml

@@ -27,7 +27,7 @@ volumeReclaimPolicy: "Retain"
 seasonpass:
   enabled: true
   image:
-    tag: "git-cc9e3f81f28ea2a9b1b0284532222adf92cf7195"
+    tag: "git-ba5228ce9985327092b3d0ea874620d3cade5721"
 
   api:
     enabled: true