Move K8s sidecar from testing/ to examples/

The K8s sidecar is a standalone example, not a test harness — it has
no CI integration unlike testing/sidecar/. Move it to examples/
alongside sidecar-nostr-relay/ where it belongs. Update internal path
references in Dockerfile, build.sh, and README.

examples/k8s-sidecar/Dockerfile

@@ -54,7 +54,7 @@ RUN printf '%s\n' \
 COPY --from=builder /build/target/release/fips    /usr/local/bin/fips
 COPY --from=builder /build/target/release/fipsctl /usr/local/bin/fipsctl
 
-COPY testing/k8s/entrypoint.sh /entrypoint.sh
+COPY examples/k8s-sidecar/entrypoint.sh /entrypoint.sh
 RUN chmod +x /entrypoint.sh
 
 HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \

examples/k8s-sidecar/README.md

@@ -10,7 +10,7 @@ configuration.
 
 ```bash
 # 1. Build the sidecar image
-cd testing/k8s
+cd examples/k8s-sidecar
 ./scripts/build.sh --tag fips-k8s-sidecar:latest
 
 # 2. Push to your registry (replace with your own)

examples/k8s-sidecar/scripts/build.sh

@@ -19,7 +19,7 @@ done
 
 if [ ! -f "$PROJECT_ROOT/Cargo.toml" ]; then
     echo "Error: Cannot find Cargo.toml at $PROJECT_ROOT" >&2
-    echo "Expected layout: <project-root>/testing/k8s/scripts/build.sh" >&2
+    echo "Expected layout: <project-root>/examples/k8s-sidecar/scripts/build.sh" >&2
     exit 1
 fi
 
@@ -34,4 +34,4 @@ echo ""
 echo "Done. Image: $IMAGE_TAG"
 echo ""
 echo "Push to your registry, then apply the example manifest:"
-echo "  kubectl apply -f testing/k8s/pod.yaml"
+echo "  kubectl apply -f examples/k8s-sidecar/pod.yaml"