security(ci): add OpenSSF Scorecard workflow and README badge

Closes SEC-005: Add OpenSSF Scorecard workflow and README badge
Coverage: 93.46% (unchanged)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: ihor-sokoliuk

.github/workflows/scorecard.yml

@@ -0,0 +1,37 @@
+name: Scorecard supply-chain security
+
+on:
+  branch_protection_rule:
+  push:
+    branches: [main]
+  schedule:
+    - cron: '0 6 * * 1'  # weekly, Monday 06:00 UTC
+
+permissions: read-all
+
+jobs:
+  analysis:
+    name: Scorecard analysis
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write
+      id-token: write
+      contents: read
+      actions: read
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+      - uses: ossf/scorecard-action@v2
+        with:
+          results_file: results.sarif
+          results_format: sarif
+          publish_results: true
+      - uses: actions/upload-artifact@v4
+        with:
+          name: SARIF file
+          path: results.sarif
+          retention-days: 5
+      - uses: github/codeql-action/upload-sarif@v3
+        with:
+          sarif_file: results.sarif

README.md

@@ -10,6 +10,7 @@
 [![Docker Pulls](https://img.shields.io/docker/pulls/isokoliuk/mcp-searxng?style=flat-square&logo=docker)](https://hub.docker.com/r/isokoliuk/mcp-searxng)
 [![License: MIT](https://img.shields.io/badge/license-MIT-blue?style=flat-square)](LICENSE)
 [![mcp-searxng MCP server](https://glama.ai/mcp/servers/ihor-sokoliuk/mcp-searxng/badges/score.svg)](https://glama.ai/mcp/servers/ihor-sokoliuk/mcp-searxng)
+[![OpenSSF Scorecard](https://api.scorecard.dev/projects/github.com/ihor-sokoliuk/mcp-searxng/badge)](https://scorecard.dev/viewer/?uri=github.com/ihor-sokoliuk/mcp-searxng)
 
 An [MCP server](https://modelcontextprotocol.io/introduction) that integrates the [SearXNG](https://docs.searxng.org) API, giving AI assistants web search capabilities.