[ci skip] f1-stream: replace Go service with Python/FastAPI skeleton

Replaces the existing Go-based f1-stream service with a new Python/FastAPI
backend as the foundation for the rebuilt F1 streaming aggregation service.

- New FastAPI backend with health and root endpoints
- Python 3.13 slim Dockerfile (replaces Go multi-stage build)
- Updated Terraform deployment (port 8000, reduced resources)
- Buildx-based redeploy.sh with --platform linux/amd64
- Added Woodpecker CI pipeline for automated builds
- Removed all old Go source, node_modules, static assets

stacks/f1-stream/files/redeploy.sh

@@ -1,6 +1,7 @@
 #!/usr/bin/env bash
 set -e
 
-docker build -t viktorbarzin/f1-stream .
-docker push viktorbarzin/f1-stream
+docker buildx build --platform linux/amd64 --provenance=false \
+  -t viktorbarzin/f1-stream:v2.0.1 -t viktorbarzin/f1-stream:latest \
+  --push .
 kubectl -n f1-stream rollout restart deployment f1-stream