docker(deps): bump python from 3.10-slim to 3.14-slim in /docker

Bumps python from 3.10-slim to 3.14-slim.

---
updated-dependencies:
- dependency-name: python
  dependency-version: 3.14-slim
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

docker/Dockerfile.test

@@ -17,7 +17,7 @@
 # ============================================================================
 
 # Stage 1: Base Image
-FROM python:3.10-slim
+FROM python:3.14-slim
 
 WORKDIR /app
 

docker/Dockerfile.test.optimized

@@ -17,7 +17,7 @@
 # ============================================================================
 
 # Stage 1: Builder - Install dependencies
-FROM python:3.10-slim AS builder
+FROM python:3.14-slim AS builder
 
 WORKDIR /build
 
@@ -46,7 +46,7 @@ RUN pip install --no-cache-dir --upgrade pip setuptools wheel && \
     rdflib==7.0.0
 
 # Stage 2: Runtime - Minimal image
-FROM python:3.10-slim
+FROM python:3.14-slim
 
 WORKDIR /app