feat: AR-VINchecker v1.0 — VIN report generator with AI analysis

FastAPI server querying NHTSA/EPA APIs, generating PDF reports
with risk scoring, and local Ollama AI analysis via DealAnalyzer.
Security hardened: XSS fix, SSRF protection, CORS restricted.

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

.gitignore

@@ -0,0 +1,15 @@
+__pycache__/
+*.py[cod]
+*.pyo
+.env
+.env.*
+output/
+*.pdf
+venv/
+.venv/
+env/
+*.egg-info/
+dist/
+build/
+.DS_Store
+Thumbs.db