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>

data/production/test-07/features/10122025_0082038C3CFBF3E5.json

@@ -0,0 +1,24 @@
+{
+  "call_id": "10122025_0082038C3CFBF3E5",
+  "events": [],
+  "turn_metrics": {
+    "total_turns": 16,
+    "agent_turns": 8,
+    "customer_turns": 8,
+    "agent_talk_ratio": 0.40787628865979386,
+    "customer_talk_ratio": 0.36681443298969074,
+    "silence_ratio": 0.17926804123711335,
+    "interruption_count": 0,
+    "avg_turn_duration_sec": 4.696562500000001,
+    "source": "observed"
+  },
+  "hold_count": 0,
+  "total_hold_duration_sec": 0.0,
+  "transfer_count": 0,
+  "silence_count": 0,
+  "interruption_count": 0,
+  "audio_duration_sec": 97.0,
+  "language": "es",
+  "speaker_count": 2,
+  "created_at": "2026-01-19T13:39:12.813050"
+}