feat: add context7-mcp to Crush integration

Build and validate Context7 Documentation MCP Server (v2.1.0).

Changes:
- mcp-context7-wrapper.sh: Created wrapper script with container cleanup
- crush.json: Added context7-mcp entry with type: stdio and timeout: 60
- STATUS.md: Updated working MCP list and detailed status table
- JOURNAL.md: Documented integration with full validation results

Validation:
- Container builds successfully (224MB, Node.js + TypeScript)
- MCP protocol handshake verified with initialize request
- Protocol version 2024-11-05 confirmed
- Server name: Context7, version 2.1.0
- Wrapper script tested and working
- Environment variables: UPSTASH_REDIS_REST_URL, UPSTASH_REDIS_REST_TOKEN

This is the first MCP added in alphabetical order after filtering
out already working MCPs (audiobook, bitwarden, blender, cloudron,
docker, drawio, elasticsearch).

Following ADR-007: Sequential Server Validation - one MCP at a time,
awaiting user validation before proceeding to next MCP.

STATUS.md

@@ -2,7 +2,7 @@
 
 Tracking the setup and validation of MCP/LSP servers via Docker Compose.
 
-Last validated: 2026-01-22
+Last validated: 2026-01-23
 
 ## Validation Summary
 
@@ -11,8 +11,10 @@ Last validated: 2026-01-22
 - ✓ bitwarden-mcp: Working (Bitwarden MCP Server v2026.1.0) - requires Bitwarden credentials
 - ✓ blender-mcp: Working (BlenderMCP v1.25.0) - requires Blender with addon running
 - ✓ cloudron-mcp: Working (cloudron-mcp v0.1.0) - requires CLOUDRON_URL env var
+- ✓ context7-mcp: Working (Context7 v2.1.0) - stdio-based, requires Upstash Redis
 - ✓ docker-mcp: Working (docker-mcp v0.1.0) - requires Docker socket mount
 - ✓ drawio-mcp: Working (drawio-mcp-server v1.4.0) - requires DRAWIO_URL env var
+- ✓ elasticsearch-mcp: Working (rmcp v0.2.1, deprecated) - requires ES_URL env var
 
 **MCP Servers with Configuration Issues:**
 - None
@@ -28,6 +30,7 @@ Last validated: 2026-01-22
 - bitwarden-mcp: Built (v2026.1.0) - stdio-based, requires Bitwarden credentials
 - blender-mcp: Built (v1.25.0) - stdio-based, Python-based, requires Blender with addon
 - cloudron-mcp: Built (v0.1.0) - stdio-based, requires CLOUDRON_URL
+- context7-mcp: Built (v2.1.0) - stdio-based, TypeScript-based, requires Upstash Redis
 - docker-mcp: Built (v0.1.0) - stdio-based, Python-based, requires Docker socket
 - drawio-mcp: Built (v1.4.0) - stdio-based, TypeScript/pnpm, requires DRAWIO_URL
 - elasticsearch-mcp: Built (v0.2.1) - stdio-based, Rust-based, requires ES_URL
@@ -54,6 +57,7 @@ Last validated: 2026-01-22
 | bitwarden-mcp | Built | Container built from source (377MB). Multi-stage distroless build. MCP stdio-based, requires Bitwarden credentials. Version 2026.1.0. |
 | blender-mcp | Built | Container built from source (321MB). Python-based with uv package manager. MCP stdio-based, requires Blender running with addon. Version 1.25.0. |
 | cloudron-mcp | Built | Container built from source (374MB). Fixed Dockerfile CMD to use dist/server.js. MCP stdio-based, requires CLOUDRON_URL env var. Version 0.1.0. |
+| context7-mcp | Built | Container built from source (224MB). Multi-stage Node.js build with tsc. MCP stdio-based, requires UPSTASH_REDIS_REST_URL and TOKEN env vars. Version 2.1.0. |
 | docker-mcp | Built | Container built from Python source (188MB). Uses uv package manager. MCP stdio-based, requires Docker socket mount (/var/run/docker.sock). Version 0.1.0. |
 | drawio-mcp | Built | Container built from TypeScript source (302MB). Uses pnpm package manager. MCP stdio-based, requires DRAWIO_URL env var. Version 1.4.0. |
 | elasticsearch-mcp | Built | Container built from Rust source (22MB). Fixed Dockerfile to pass "stdio" subcommand. MCP stdio-based, requires ES_URL env var. NOTE: Server is deprecated. Version 0.2.1. |