Deployed 2026-08-20. Adds dartsymbolmap chunk-upload support and
crashpad minidump ingestion; fixes the method-scoped SPA fallback
that 405'd every non-GET API request.
Old: sha-319e0eb@sha256:1e5a2d8ab80e703de4a8a8b15d858ce931609e2226bf1e6d04979c0ca52a3005
New: sha-c996cf3@sha256:540d985c51f953704c8b97c6c568d0ffc107b91223dd5279136cce1c5522598b
Index verified on two hosts; linux/amd64 + linux/arm64 present.
Migration 18 (event_attachments) rehearsed on a cloned DB copy.
Rollback: prior digest + /root/bugs-db-backup-20260820-082218 on the host.