deploy_skill: soporte para Coolify v4.1.2 (API /applications 404) + flujo UI Playwright

Aprendido desplegando cotizador (Next.js+FastAPI+Postgres, Docker Compose,
repo privado) en coolify.urieljareth.org (v4.1.2):

- Documenta que /applications/* devuelve 404 en esta instancia y que configurar
  apps git build-from-source solo es posible por la UI web.
- Nuevos scripts scripts/coolify-ui/: coolify-login.mjs (guarda storageState) y
  Configure-CoolifyComposeApp.mjs (build pack -> Docker Compose, Reload Compose
  File, env vars por Developer view, dominios por servicio).
- references/coolify-4.1.2-notes.md: mapa de API funcional/404, gotchas (BOM
  UTF-8 rompe el parser YAML de Coolify; Reload Compose File obligatorio; pin de
  dominios por servicio o 503; no encolar deploys concurrentes; PowerShell
  [IO.File]::ReadAllText para payloads de llaves).
- env.local.template.ps1: COOLIFY_EMAIL/COOLIFY_PASSWORD para la UI.
- SKILL.md/TOOLS.md: seccion "instance reality" y flujo UI paso a paso.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

deploy_skill/references/templates/docker-compose.app-db.yml

@@ -0,0 +1,52 @@
+# Reference docker-compose for a multi-container app on this Coolify instance.
+#
+# Implements EVERY hard rule from docs/AGENTS-coolify-apps.md:
+#   2.1 App reaches DB by Docker service name (app-db), never localhost.
+#   2.2 Joins the external 'coolify' network so it can resolve shared services.
+#   2.3 Does NOT publish 80/443 (owned by coolify-proxy). Traefik routes.
+#   2.4 FQDN is set in Coolify (https://<name>.urieljareth.org) before deploy.
+#   2.5 Secrets come as env vars from Coolify. None are baked in here.
+#   4   Healthcheck on a DB-independent endpoint.
+#   5   Named volumes for data that must survive redeploys.
+
+services:
+  app:
+    build: .
+    environment:
+      DB_HOST: app-db
+      DB_PORT: "5432"
+      DB_NAME: ${DB_NAME}
+      DB_USER: ${DB_USER}
+      DB_PASSWORD: ${DB_PASSWORD}
+      APP_PUBLIC_URL: https://app.urieljareth.org
+    expose:
+      - "8080"
+    healthcheck:
+      test: ["CMD", "wget", "-qO-", "http://localhost:8080/health"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+      start_period: 20s
+    networks:
+      - coolify
+    depends_on:
+      - app-db
+
+  app-db:
+    image: postgres:16
+    environment:
+      POSTGRES_DB: ${DB_NAME}
+      POSTGRES_USER: ${DB_USER}
+      POSTGRES_PASSWORD: ${DB_PASSWORD}
+    volumes:
+      - app-db-data:/var/lib/postgresql/data
+    networks:
+      - coolify
+
+volumes:
+  app-db-data: {}
+
+networks:
+  coolify:
+    name: coolify
+    external: true