docs: audit + fix — remove observe CLI refs, correct defaults, fix public API imports, add historical banners

docs/extensions/TIMEOUTS-REDIRECTS-CONCURRENCY.md

@@ -1,4 +1,4 @@
-# APOPHIS v1.0 Extension Specification: Timeouts and Redirects
+# APOPHIS Extension Specification: Timeouts and Redirects
 
 ## Document Information
 - **Version**: 1.0
@@ -64,6 +64,8 @@ fastify.get('/slow-endpoint', {
 
 When a timeout is configured, `executeHttp` uses an abortable timer where supported. The timeout must be cleared in `finally`; Fastify injection may continue running after timeout if the underlying transport cannot be cancelled.
 
+> **Note**: The code examples in this section are illustrative representations of the timeout, redirect, and concurrency mechanisms. The actual implementation may differ in detail.
+
 ```typescript
 // In src/infrastructure/http-executor.ts
 if (timeoutMs && timeoutMs > 0) {