docs(mcp): fix stale SDK reference in Platform Integration section

PR #17 updated known-issues.md but dropped the CLAUDE.md fix.
The Platform Integration section incorrectly claimed the server uses
the Python SDK (molecule-sdk-python). The MCP server has its own
TypeScript client in src/api.ts — the Python SDK is for remote agents.

Also fixed "reads data via the platform SDK" → "reads data via the
platform REST API" in the Postgres section.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

CLAUDE.md

@@ -96,7 +96,10 @@ The workflow:
 
 ### APIs Connected
 
-The server connects to the Molecule AI platform REST API. See the platform SDK (`../molecule-sdk-python`) for the underlying API client used.
+The server connects to the Molecule AI platform REST API via its own TypeScript
+client (`src/api.ts`). It does not use the Python SDK (`molecule-sdk-python`) —
+the Python SDK is for remote agents that run outside the platform; this server
+runs as an MCP bridge *on* the operator side.
 
 ### Environment Variables
 
@@ -110,7 +113,7 @@ For local development, copy `.env.example` → `.env` and fill in values.
 
 ### Postgres
 
-Platform data lives in Postgres (source of truth). The server reads data via the platform SDK — it does not connect to Postgres directly.
+Platform data lives in Postgres (source of truth). The server reads data via the platform REST API — it does not connect to Postgres directly.
 
 ## TypeScript Conventions