Add redMCP stdio MCP server

docs/redmineup_local_fork_changelog.md

@@ -32,6 +32,33 @@ environment. Before risky edits, archive the current plugin directories in
   - Run `validate_helpdesk_outbox_worker.py` after outbox or worker changes,
     then choose the external index target.
 
+## 2026-04-25 - redMCP Native Search And Filtering
+
+- Touched areas:
+  - `redMCP`
+- Purpose:
+  - Make Redmine's existing issue filtering and built-in text search explicit
+    before adding external search infrastructure.
+  - Make redMCP runnable as a stdio MCP server for live client testing.
+- Behavior changed:
+  - Added `filterIssues()` as a named alias for Redmine's `/issues.json`
+    filtering.
+  - Added `search()` for Redmine's built-in `/search.json` endpoint.
+  - Added `searchIssues()` for issue-only Redmine text search.
+  - Added `redMCP/bin/redmcp-server.php`, a dependency-light stdio MCP server
+    that exposes Redmine filtering/search, issue CRUD, Helpdesk-aware reads, and
+    explicit Helpdesk response tools.
+  - Registered the MCP server as a Composer `bin` entry.
+- LAN test result:
+  - `php -l redMCP/app/RedmineClient.php` passed.
+  - `php -l redMCP/bin/redmcp-server.php` passed.
+  - `composer validate --working-dir=redMCP` passed; Composer emitted PHP 8.5
+    deprecation notices from system Composer dependencies.
+  - Live stdio MCP framing test passed for `initialize`, `tools/list`, and
+    `tools/call` using `redmine_search_issues` against `fud-helpdesk`.
+  - The live MCP tool call returned two issue search results from seven total
+    for `redMCP-smoke`.
+
 ## 2026-04-25 - Test Helpdesk Credential Sanitization
 
 - Touched areas: