feat: implement AI Workspace context MCP server with read-only access and add related tests

scripts/mcp/aiw-context-mcp/README.md

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+# AIW Context MCP
+
+Read-only local Model Context Protocol server for AI Workspace context.
+
+The server exposes bounded local evidence and canonical Markdown context to MCP clients. It does not capture traffic, send messages, mutate files, or promote memory.
+
+## HTTP transport
+
+The service manager starts the HTTP transport by default:
+
+```bash
+python3 scripts/aiw/services.py start aiw-context-mcp --profile fidelity
+```
+
+Endpoint:
+
+```text
+http://127.0.0.1:8765/mcp
+```
+
+Health:
+
+```text
+http://127.0.0.1:8765/health
+```
+
+## stdio transport
+
+For clients that require stdio, launch:
+
+```bash
+python3 scripts/mcp/aiw-context-mcp/server.py --transport stdio
+```
+
+## Tools
+
+- `context_profiles`
+- `communication_latest`
+- `communication_date_context`
+- `communication_standup_context`
+- `communication_channel_context`
+- `communication_thread_context`
+- `project_current_context`
+- `project_search_memory`
+- `photos_latest`
+
+All tools are read-only. Mattermost tools read `ai/inbox/mattermost-mirror/`; photo tools list local Photo Inbox files without embedding image data; project tools read canonical Markdown under `project-knowledge/`.
+
+## Tests
+
+```bash
+python3 scripts/mcp/aiw-context-mcp/test_server.py
+```