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

docs/chaos.md

@@ -28,7 +28,7 @@ Adds artificial latency. Tests timeout contracts:
 response_time(this) < 1000
 ```
 
-**Note**: Delay events are generated by the chaos arbitrary but the inbound delay handler is currently a no-op. Use this for timeout contract documentation; actual delay injection requires the outbound delay strategy or a custom handler.
+Delay chaos strategies (`inbound-delay`, `outbound-delay`) are applied at the transport level between request execution and contract evaluation. The inline chaos handlers for these strategies are no-ops because `sleep()` handles delay application out-of-band. Delay contracts such as `response_time(this) < 1000` will still work correctly with chaos injection.
 
 ### Error
 
@@ -69,26 +69,7 @@ Built-in strategies are content-type agnostic:
 
 Extension strategies can add content-type-specific behavior if needed.
 
-## Custom Corruption via Extensions
-
-```javascript
-const myExtension = {
-  name: 'custom-corrupt',
-  corruptionStrategies: {
-    'application/vnd.api+json': (data) => ({
-      ...data,
-      corrupted: true,
-    }),
-    'text/*': (data) => `CORRUPTED:${String(data)}`,
-  },
-};
-
-await fastify.register(apophis, {
-  extensions: [myExtension],
-});
-```
-
-Extension strategies take precedence over built-ins. Wildcard patterns (`text/*`) match any subtype.
+**Note**: Extension-defined corruption strategies are documented for future implementation. Currently, corruption strategies (`truncate`, `malformed`, `field-corrupt`) are hardcoded in the chaos engine.
 
 ## Environment Guard