feat: Add Render.com deployment support with production data

Render Configuration:
- render.yaml for declarative deployment
- requirements-dashboard.txt (lightweight deps for cloud)
- Updated .streamlit/config.toml for production
- Updated app.py to auto-detect production vs local data

Production Data:
- Added data/production/test-07/ with 30 real call analyses
- Updated .gitignore to allow data/production/

Documentation:
- Added Render.com section to DEPLOYMENT.md with step-by-step guide

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.streamlit/config.toml

@@ -9,7 +9,9 @@ font = "sans serif"
 
 [server]
 headless = true
-port = 8510
+# port = 8510  # Local only; Render uses $PORT env var
+enableCORS = false
+enableXsrfProtection = true
 
 [browser]
 gatherUsageStats = false