[AZ-1074] [AZ-1075] gRPC tile stream tests and shared proto

Extract tile_provision.proto into GrpcContracts, add integration
tests and validation hardening for DeliverRouteTiles streaming.

Co-authored-by: Cursor <cursoragent@cursor.com>

_docs/03_implementation/batch_01_cycle9_report.md

@@ -0,0 +1,31 @@
+# Batch Report
+
+**Batch**: 1
+**Tasks**: AZ-1074, AZ-1075
+**Date**: 2026-06-25
+**Cycle**: 9
+
+## Task Results
+
+| Task | Status | Files Modified | Tests | AC Coverage | Issues |
+|------|--------|---------------|-------|-------------|--------|
+| AZ-1074 gRPC TileStream Service | Done | Service existed (275ee1b); added InvalidArgument RpcException + lat/lon validation | 12 unit + smoke integration pass | 4/4 | None |
+| AZ-1075 gRPC Integration Tests | Done | GrpcTestHelpers + RouteTileDeliveryGrpcTests + GrpcContracts project | smoke integration pass | 3/3 | None |
+
+## Notes
+
+- Core gRPC delivery (`DeliverRouteTiles`, orchestrator, proto) landed in commit `275ee1b` before cycle 9 Step 10; this batch adds validation hardening, shared `SatelliteProvider.GrpcContracts`, and blackbox integration coverage.
+- `SatelliteProvider.GrpcContracts` holds `tile_provision.proto` (GrpcServices=Both); Api + IntegrationTests reference it.
+- Integration-tests Dockerfile uses `linux/amd64` to avoid protoc segfault on arm64 Docker.
+- Integration-tests Dockerfile uses `linux/amd64` build + `aspnet:10.0` runtime (Grpc.AspNetCore dependency).
+- Smoke integration run passed (448 unit + full smoke subset including gRPC tests). Local port 5433 conflict avoided via compose override unpublishing host ports; dev TLS cert must include SAN `DNS:api` (regenerate via `scripts/run-tests.sh` if stale).
+
+## AC Test Coverage: All covered
+
+## Code Review Verdict: PASS_WITH_WARNINGS (see reviews/batch_01_cycle9_review.md)
+
+## Auto-Fix Attempts: 0
+
+## Stuck Agents: None
+
+## Next Batch: All tasks complete