build: bump to Python 3.14 and update dependencies

Dockerfile

@@ -1,5 +1,5 @@
 # Multi-stage build for smaller image size
-FROM python:3.9-alpine AS python-base
+FROM python:3.14-alpine AS python-base
 
 # Install runtime dependencies
 RUN apk add --no-cache curl
@@ -29,7 +29,7 @@ RUN pip install --no-cache-dir -r requirements.txt
 FROM python-base
 
 # Copy installed Python packages and binaries from builder stage
-COPY --from=builder /usr/local/lib/python3.9/site-packages /usr/local/lib/python3.9/site-packages
+COPY --from=builder /usr/local/lib/python3.14/site-packages /usr/local/lib/python3.14/site-packages
 COPY --from=builder /usr/local/bin /usr/local/bin
 
 # Copy application files