feat: Domain 2 Phase 3-4 — wiki article tool, DCP compress toggle, Go sidecar deprecation

Phase 3: get_wiki_article tool wraps codesight_get_wiki_article MCP
(cached, persistent codebase wiki). DCP compress toggle on
get_codebase_overview (compress=true for large projects >50 files).

Phase 4: Deprecation markers on Go codecontext sidecar. Warning log
in callCodecontext(), deprecation comments in factory.ts and
docker-compose.yml. Sidecar remains functional — removal deferred.

docker-compose.yml

@@ -95,6 +95,13 @@ services:
   # HTTP shim (see ./codecontext/). No host port — reached from boocode at
   # http://codecontext:8080 over the boocode_net bridge.
   #
+  # DEPRECATED (Phase 4, Domain 2, v2.8.14): Superseded by the boocontext
+  # MCP server. The 16 codecontext tool wrappers still use this sidecar via
+  # HTTP but should route through the boocontext MCP instead. Keep the
+  # service running for backward compatibility until all callers migrate.
+  # Remove this block after full migration — see codecontext_client.ts and
+  # factory.ts for deprecation markers.
+  #
   # Mounts /opt:/opt:ro (not just /opt/projects:ro): BooCode projects live
   # at /opt/<slug> on the host, not exclusively under /opt/projects. The
   # mount must cover anywhere a project.path could resolve to. Read-only