fix: docker/api/Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-DEBIAN12-ZLIB-6008963
- https://snyk.io/vuln/SNYK-DEBIAN12-PAM-10378969
- https://snyk.io/vuln/SNYK-DEBIAN12-PAM-10378969
- https://snyk.io/vuln/SNYK-DEBIAN12-PAM-10378969
- https://snyk.io/vuln/SNYK-DEBIAN12-PAM-10378969

Author: snyk-bot

docker/api/Dockerfile

@@ -1,5 +1,5 @@
 # Build stage
-FROM python:3.12-slim AS builder
+FROM python:3.13.5-slim AS builder
 
 # Install build dependencies
 RUN apt-get update && apt-get install -y \
@@ -17,7 +17,7 @@ COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
 # Runtime stage
-FROM python:3.12-slim
+FROM python:3.13.5-slim
 
 # Install runtime dependencies
 RUN apt-get update && apt-get install -y \