refactor: the clinical index volume is named for what it holds

mcp-server_mcp-data carried the Compose project prefix, which tied its name to a
directory that has since been renamed to clinical-assist-deploy. It is now
clinical-assist-data, named explicitly in both stacks so it no longer depends on
a project name at all.

Migrated rather than renamed, because Docker cannot rename a volume: writers
stopped, 2.9GB copied, then verified before switching — 13265 files both sides,
3080478708 bytes of file content both sides, and an md5 over every file in
sorted order matching exactly. The old volume is kept, and is now referenced by
nothing, so it can be removed once this has run for a while.

Also removed mcp-server_qdrant-data: 1.7GB belonging to a Qdrant deployment that
no longer exists and which no container mounted.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Dv6sqaY6Vq3ChZHMem3cnU

docker-compose.yml

@@ -113,7 +113,7 @@ volumes:
   redis-data:
   clinical-assistant-mcp-data:
     external: true
-    name: mcp-server_mcp-data
+    name: clinical-assist-data
 
 networks:
   danvics_mcp: