Obsolete: deduplicate Fastly and Cloudflare runtime-env key enumeration #360

Description

The original cleanup proposed moving duplicated Fastly/Cloudflare EDGEZERO__STORES__* key enumeration into core. Its duplication premise no longer applies: PR #381 removed Fastly runtime-env key enumeration along with the descriptor store. Cloudflare still derives keys because Workers bindings cannot be enumerated.

Steps to reproduce

Inspection steps (no tests executed):

1. Inspect remaining Cloudflare key enumeration.
2. Search current Fastly code for runtime_env_keys / runtime_env_config; both old helpers are absent.
3. Inspect current logical-alias store metadata, which defines logical store aliases rather than a shared runtime-env loader.

Expected behavior

A shared core abstraction is introduced only when there are actual shared consumers. The former Fastly/Cloudflare duplicate must not be recreated.

Impact

There is no current cross-adapter duplication of the reported key-enumeration loop. Hoisting the remaining single-consumer helper would add an abstraction without delivering the original drift-prevention benefit.

Proposed fix

Close as obsolete/not planned after the Fastly architecture replacement. Keep the Cloudflare enumeration local unless another supported consumer establishes a real shared contract.

Done when

• Verify the Fastly duplicate has been removed.
• Document that the original core-hoist proposal is superseded, while Cloudflare keeps its required provider-specific enumeration.

Related

PR #351 is historical context; PR #381 removed the duplicate consumer; remaining Cloudflare key enumeration.