chore(devops): dotnet release image + compose/bootstrap stabilization

Sprint SPRINT_20260417_024_DevOps_dotnet_release_image_stabilization.

- Dockerfile.platform + Dockerfile.dotnet-service adjustments for
  deterministic layer ordering and cache-friendly publish.
- devops/release/components.json updates.
- devops/compose: .env, README, legacy + stella-services docker-compose,
  stellaops env example, postgres-init 04/04b/15/16 authority + release
  schemas, setup.bootstrap.local.yaml.
- Gitea build_release.py script.
- scripts/register-local-integrations.ps1.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitea/scripts/release/build_release.py

@@ -295,8 +295,8 @@ class ReleaseBuilder:
             build_args.update({
                 "PROJECT": component["project"],
                 "ENTRYPOINT_DLL": component["entrypoint"],
-                "SDK_IMAGE": docker_cfg.get("sdkImage", "mcr.microsoft.com/dotnet/nightly/sdk:10.0"),
-                "RUNTIME_IMAGE": docker_cfg.get("runtimeImage", "gcr.io/distroless/dotnet/aspnet:latest"),
+                "SDK_IMAGE": docker_cfg.get("sdkImage", "mcr.microsoft.com/dotnet/sdk:10.0"),
+                "RUNTIME_IMAGE": docker_cfg.get("runtimeImage", "mcr.microsoft.com/dotnet/aspnet:10.0"),
             })
         elif kind == "angular-ui":
             build_args.update({