feat(codecontext): upgrade sidecar to boocontext MCP aggregator

- Multi-stage Dockerfile builds boocontext (Node) + HTTP shim (Go)
- shim.go supports CODECONTEXT_CHILD env var for configurable MCP child
- Adds routes for get_symbol_details, get_call_graph, get_blast_radius
- docker-compose.yml adds env vars for child MCP paths

docker-compose.yml

@@ -109,10 +109,16 @@ services:
     ports:
       - "127.0.0.1:8080:8080"
     restart: unless-stopped
+    environment:
+      CODECONTEXT_CHILD: node /usr/local/lib/boocontext/dist/index.js
+      TYPE_INJECT_MCP_PATH: /opt/type-inject/packages/mcp/dist/index.js
+      TREE_SITTER_MCP_CMD: uvx
+      TREE_SITTER_MCP_ARGS: --from tree-sitter-analyzer[mcp] tree-sitter-analyzer-mcp
     networks:
       - boocode_net
     volumes:
       - /opt:/opt:ro
+      - /opt/forks:/opt/forks:ro
     healthcheck:
       test: ["CMD-SHELL", "wget -qO- http://localhost:8080/health || exit 1"]
       interval: 30s