release: add docs/OPERATIONS.md

docs/OPERATIONS.md

@@ -90,7 +90,7 @@ Browser
 Cloudflare Pages  —  satquery.pages.dev                 (static frontend, 11 pages)
   │  HTTPS / JSON  →  /api/*
   ▼
-Render            —  satquery-backend-m4yv.onrender.com  (orchestrator / API gateway)
+Render            —  <backend-host>  (orchestrator / API gateway)
   │  outbound long-poll  POST /tunnel/agent
   ▼
 GitHub Codespace  —  FastAPI inference, CPU, port 8000
@@ -133,7 +133,7 @@ Read from the GitHub API during the release reconnaissance (`release/CURRENT_REL
 | Component | Repository | Visibility | Branch | Revision | Host |
 |---|---|---|---|---|---|
 | Frontend | `Anish-lab-blip/SatQuery-Frontend` | **private** | `main` | **`2d7ae53b482d`** | Cloudflare Pages → `satquery.pages.dev` |
-| Backend / orchestrator | `Anish-lab-blip/SatQuery-Backend` | **private** | `main` | **`89d80eaddec5`** | Render → `satquery-backend-m4yv.onrender.com` |
+| Backend / orchestrator | `Anish-lab-blip/SatQuery-Backend` | **private** | `main` | **`89d80eaddec5`** | Render → `<backend-host>` |
 | Inference | `Anish-lab-blip/SatQuery-Inference` | **private** | `main` | **`5a0936ace491`** | Codespace `potential-space-trout-r4ppw969w45j2pvvw`, port 8000, via outbound tunnel |
 | Public umbrella | `Anish-lab-blip/SatQuery-AI` | **public** | `main` | `3dcabd32da41` ("Initial commit") | this release home |
 | Monorepo (working copy) | `C:/Users/anish/satquery-ai` | local only | `master` | `9d57aed` | **no git remote**; 334 dirty entries |
@@ -262,7 +262,7 @@ path is dead for a private repository (`release/CURRENT_RELEASE_STATE.md` §2: *
 is **dead** (302 for a private repo); the tunnel is the live transport."*).
 
 ```bash
-curl --noproxy '*' https://satquery-backend-m4yv.onrender.com/api/health
+curl --noproxy '*' https://<backend-host>/api/health
 ```
 
 Read `tunnel.agent_connected`. `true` means an agent has polled recently; `false` means **no agent has
@@ -378,7 +378,7 @@ Codespace start
 ```
 
 The hub URL the agent dials is `SATQUERY_HUB_URL`, defaulting to
-`https://satquery-backend-m4yv.onrender.com` (`deploy/codespace/launch.sh:59-61`).
+`https://<backend-host>` (`deploy/codespace/launch.sh:59-61`).
 
 **What the operator does:**