Reconcile docs: add mcdoc to project map, mark mcdsl gap done

- CLAUDE.md: add mcdoc to project map and dependency graph
- PLATFORM_EVOLUTION.md: mark gap #1 (mcdsl versioning) as done —
  all services already use tagged versions with no replace directives.
  Add immediate next steps section.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -16,6 +16,7 @@ Metacircular is a multi-service personal infrastructure platform. This root repo
 | `mcr/` | OCI container registry — integrated with MCIAS for auth and policy-based push/pull | Go |
 | `mcat/` | MCIAS login policy tester — lightweight web app to test and audit login policies | Go |
 | `mcdsl/` | Standard library — shared packages for auth, db, config, HTTP/gRPC servers, CSRF, snapshots | Go |
+| `mcdoc/` | Documentation server — renders markdown from Gitea, serves public docs via mc-proxy | Go |
 | `mcns/` | Networking service — CoreDNS precursor serving internal DNS zones until full MCNS is built | CoreDNS |
 | `ca/` | PKI infrastructure and secrets for dev/test (not source code, gitignored) | — |
 
@@ -30,6 +31,7 @@ mcias (standalone — no MCIAS dependency)
   ├── metacrypt (uses MCIAS for auth)
   ├── mc-proxy (uses MCIAS for admin auth)
   ├── mcr (uses MCIAS for auth + policy)
+  ├── mcdoc (public, no MCIAS — fetches docs from Gitea)
   ├── mcns (will use MCIAS for auth; CoreDNS precursor for now)
   └── mcat (tests MCIAS login policies)
 ```