Initial segregate: proxy source, deploy manifests, ImagePolicy Flux CRs.

Move workload out of infra with cursor-devbox-style GitRepository +
run_number-sha image automation.

README.md

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+# cursor-agent-api-proxy
+
+OpenAI-compatible HTTP API wrapping `cursor-agent` via **ACP** (`agent acp`). Deployed on **node4-k3s**.
+
+- **Image**: `dcr.trinitysan.by/infra/cursor-agent-api-proxy`
+- **Deploy**: `deploy/` (PVC, Deployment, Service, ServiceExport)
+- **Flux image automation**: `flux/` (ImageRepository / ImagePolicy / ImageUpdateAutomation)
+
+Infra on node4 keeps thin Flux glue (Namespace, SecretAdapters, `GitRepository`, Kustomizations) in `infrastructure/node4-k3s/131-cursor-agent-api.yaml`. Public HTTPS + Authentik live on node2 (`245-authentik-cursor-agent-api`).
+
+## Access
+
+| Endpoint | Detail |
+|----------|--------|
+| Public | `https://cursor-api.trinitysan.by` (Authentik outpost on node2) |
+| In-cluster / MCS | `cursor-agent-api.cursor-agent-api.svc.clusterset.local:4646` |
+| Health | `GET /health` |
+
+## CI
+
+Gitea Actions (`.gitea/workflows/build-and-push.yaml`) on `master` and `workflow_dispatch` pushes:
+
+| Tag | Purpose |
+|-----|---------|
+| `:latest` | Convenience |
+| `:<git-sha>` | Immutable full SHA |
+| `:<run_number>-<git-sha>` | Sortable; elected by Flux ImagePolicy |
+
+Org secrets: `DCR_USERNAME`, `DCR_PASSWORD` (infra org).
+
+## Local build / E2E
+
+```bash
+docker build -t cursor-agent-api-proxy:latest .
+# Requires CURSOR_API_KEY in env or .env
+./scripts/e2e-docker.sh
+```
+
+## Flux update flow
+
+1. CI pushes `run_number-sha` to DCR
+2. ImageRepository scans; ImagePolicy picks highest `run_number`
+3. ImageUpdateAutomation commits the new tag into `deploy/010-cursor-agent-api.yaml`
+4. Kustomization applies; Deployment rolls
+
+Requires a Gitea PAT with **read+write** on this repo (`GITEA_CURSOR_AGENT_API_GITOPS_TOKEN` on node4, see infra `060-external-secrets.yaml.template`).