CD/CD consolidation

devops/services/signals-ops/README.md

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+# Signals CI/CD & Local Stack (DEVOPS-SIG-26-001)
+
+Artifacts:
+- Compose stack: `ops/devops/signals/docker-compose.signals.yml` (Signals API + Mongo + Valkey + artifact volume).
+- Sample config: `ops/devops/signals/signals.yaml` (mounted into the container at `/app/signals.yaml` if desired).
+- Dockerfile: `ops/devops/signals/Dockerfile` (multi-stage build on .NET 10 RC).
+- Build/export helper: `scripts/signals/build.sh` (saves image tar to `out/signals/signals-image.tar`).
+- Span sink stack: `ops/devops/signals/docker-compose.spansink.yml` + `otel-spansink.yaml` to collect OTLP traces (Excititor `/v1/vex/observations/**`) and write NDJSON to `spansink-data` volume. Run via `scripts/signals/run-spansink.sh`.
+- Grafana dashboard stub: `ops/devops/signals/dashboards/excititor-vex-traces.json` (import into Tempo-enabled Grafana).
+
+Quick start (offline-friendly):
+```bash
+# build image
+scripts/signals/build.sh
+
+# run stack
+COMPOSE_FILE=ops/devops/signals/docker-compose.signals.yml docker compose up -d
+
+# hit health
+curl -s http://localhost:5088/health
+
+# run span sink collector
+scripts/signals/run-spansink.sh
+```
+
+Configuration (ENV or YAML):
+- `Signals__Mongo__ConnectionString` default `mongodb://signals-mongo:27017/signals`
+- `Signals__Cache__ConnectionString` default `signals-valkey:6379`
+- `Signals__Storage__RootPath` default `/data/artifacts`
+- Authority disabled by default for local; enable with `Signals__Authority__Enabled=true` and issuer settings.
+
+CI workflow:
+- `.gitea/workflows/signals-ci.yml` restores, builds, tests, builds container, and uploads `signals-image.tar` artifact.
+
+Dependencies:
+- Mongo 7 (wiredTiger)
+- Valkey 8 (cache, BSD-3 licensed Redis fork)
+- Artifact volume `signals_artifacts` for callgraph blobs.