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.

mcp-context7-wrapper.sh

@@ -0,0 +1,21 @@
+#!/bin/sh
+# Wrapper script for context7-mcp
+# Ensures clean container with proper name
+
+CONTAINER_NAME="kneldevstack-aimiddleware-context7-mcp-crush"
+IMAGE_NAME="kneldevstack-aimiddleware-context7-mcp"
+
+# Force remove existing container if it exists (in any state)
+if docker ps -a --filter "name=${CONTAINER_NAME}" --format '{{.Names}}' 2>/dev/null | grep -q "^${CONTAINER_NAME}$"; then
+    docker rm -f "${CONTAINER_NAME}" >/dev/null 2>&1
+    # Wait for container to be fully removed
+    while docker ps -a --filter "name=${CONTAINER_NAME}" --format '{{.Names}}' 2>/dev/null | grep -q "^${CONTAINER_NAME}$"; do
+        sleep 0.05
+    done
+fi
+
+# Start MCP server with explicit name and environment variables
+exec docker run -i --rm --name "${CONTAINER_NAME}" \
+    -e "UPSTASH_REDIS_REST_URL=${UPSTASH_REDIS_REST_URL:-}" \
+    -e "UPSTASH_REDIS_REST_TOKEN=${UPSTASH_REDIS_REST_TOKEN:-}" \
+    "${IMAGE_NAME}" "$@"