Add version tracking and model metadata to API

- Add VERSION = "2.0.0" to track API version
- Add MODEL_VERSION = "CV_Test-2026-01-05" to identify model source
- Add LAST_UPDATED timestamp for deployment tracking
- Include version info in health check endpoints
- Now shows num_classes (11) with 'hi' gesture support

This ensures users can verify the latest model deployment.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

app.py

@@ -10,16 +10,22 @@ from fastapi.middleware.cors import CORSMiddleware
 from pydantic import BaseModel
 from typing import List, Dict
 import mediapipe as mp
+from datetime import datetime
 
 from model import CustomLSTM
 from preprocessing import decode_base64_image, process_frame
 
 
+# Version and deployment info
+VERSION = "2.0.0"
+MODEL_VERSION = "CV_Test-2026-01-05"  # Updated with 'hi' gesture support
+LAST_UPDATED = "2026-01-05T10:00:00Z"
+
 # Initialize FastAPI app
 app = FastAPI(
     title="Sign Language Recognition API",
     description="Real-time Malaysian Sign Language (MSL) recognition using MediaPipe and LSTM",
-    version="1.0.0"
+    version=VERSION
 )
 
 # Enable CORS for web app access
@@ -100,6 +106,10 @@ class HealthResponse(BaseModel):
     device: str
     model_loaded: bool
     gestures: List[str]
+    version: str
+    model_version: str
+    last_updated: str
+    num_classes: int
 
 
 @app.get("/", response_model=HealthResponse)
@@ -109,7 +119,11 @@ async def root():
         "status": "healthy",
         "device": str(device),
         "model_loaded": True,
-        "gestures": GESTURES
+        "gestures": GESTURES,
+        "version": VERSION,
+        "model_version": MODEL_VERSION,
+        "last_updated": LAST_UPDATED,
+        "num_classes": NUM_CLASSES
     }
 
 
@@ -120,7 +134,11 @@ async def health():
         "status": "healthy",
         "device": str(device),
         "model_loaded": True,
-        "gestures": GESTURES
+        "gestures": GESTURES,
+        "version": VERSION,
+        "model_version": MODEL_VERSION,
+        "last_updated": LAST_UPDATED,
+        "num_classes": NUM_CLASSES
     }