docs(site): document the review pass on the published site

Two new chapters (epistemic honesty, privacy) and updates across
concepts, beliefs, conversation, cognition, graph, replay, providers,
security, decisions, development, glossary, API, interface tour and the
landing page. Rebuilt into dixon.cx (website commit d541bc9).

docs/site/pages/api.md

@@ -25,6 +25,10 @@ Users have one of three roles. **Observer** can read everything. **Operator** ca
 
 `POST /api/v1/webhooks/{id}` is the one unauthenticated route. It requires the `X-Noema-Timestamp` and `X-Noema-Signature` headers described under [integrations](integrations) and refuses everything else.
 
+## Added in 0.2
+
+`GET /api/v1/minds/{mind}/assertions` and `/assertions/actors` list what was said to a mind and by whom, apart from what it believes. `GET /api/v1/events/{id}/chain` returns the bounded causal chain around an event. `POST /api/v1/minds/{mind}/redactions` (administrators) performs an audited redaction and `GET` lists the ledger. Experiments accept `variants`, and snapshot, replay and experiment responses carry the runtime identity and, for replays, the compatibility label and divergence analysis.
+
 ## Route reference
 
 The table below is generated from the OpenAPI document.