Declare or remove the opid_store development reference #1149

Description

.env.dev still sets TRUSTED_SERVER__SYNTHETIC__OPID_STORE=opid_store, while fastly.toml does not declare an opid_store KV store. The integration-test Viceroy fixture also declares opid_store. These references need to be reconciled with current synthetic-operation settings before deciding whether a store is required; the original PR #1049 finding covered only the development environment reference.

Proposed fix

Trace whether current runtime configuration or tests consume this store. If a store is still required, declare and exercise it consistently in local and deployment configuration. If it was retired, remove stale .env.dev and fixture references. Add a focused consistency check for whichever configuration is retained.

Done when

• The intended store behavior is documented and all development, Viceroy and Fastly declarations agree.
• No configured store name silently points to an undeclared physical store.
• A regression test or config validation catches an inconsistent reference.

Related

PR #1049 documentation refresh.