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_0082038C3CFBF80E.json

@@ -0,0 +1,58 @@
+{
+  "call_id": "10122025_0082038C3CFBF80E",
+  "events": [
+    {
+      "event_type": "SILENCE",
+      "start_time": 353.11,
+      "end_time": 359.2,
+      "duration_sec": 6.089999999999975,
+      "metadata": {
+        "before_speaker": "B",
+        "after_speaker": "A"
+      },
+      "source": "observed"
+    },
+    {
+      "event_type": "SILENCE",
+      "start_time": 392.65,
+      "end_time": 399.37,
+      "duration_sec": 6.720000000000027,
+      "metadata": {
+        "before_speaker": "A",
+        "after_speaker": "B"
+      },
+      "source": "observed"
+    },
+    {
+      "event_type": "SILENCE",
+      "start_time": 520.62,
+      "end_time": 534.94,
+      "duration_sec": 14.32000000000005,
+      "metadata": {
+        "before_speaker": "B",
+        "after_speaker": "A"
+      },
+      "source": "observed"
+    }
+  ],
+  "turn_metrics": {
+    "total_turns": 51,
+    "agent_turns": 26,
+    "customer_turns": 25,
+    "agent_talk_ratio": 0.4114076782449725,
+    "customer_talk_ratio": 0.4321023765996342,
+    "silence_ratio": 0.13429616087751395,
+    "interruption_count": 0,
+    "avg_turn_duration_sec": 9.218399999999999,
+    "source": "observed"
+  },
+  "hold_count": 0,
+  "total_hold_duration_sec": 0.0,
+  "transfer_count": 0,
+  "silence_count": 3,
+  "interruption_count": 0,
+  "audio_duration_sec": 547.0,
+  "language": "es",
+  "speaker_count": 2,
+  "created_at": "2026-01-19T13:39:12.823972"
+}