Convert baserow, letta, invoicing to mesh catalog DB consumers

Mirror the postgres-consumer shape (keycloak/nextcloud): requires the
backing service(s), binds/secrets for the delivered credential, and a
server container that reads it from an interpolated env file.

- baserow: consumes postgres-database + redis-cache; tooled (dormant
  until an account is configured, like gitea's token).
- letta: consumes postgres-database; tooled, live via a mesh-minted
  server-password injected into both server and runtime.
- invoicing: consumes mongodb-database + s3-bucket; plain two-container
  service (app + api), no tools.

Digests pinned for baserow and letta; invoicing keeps private-registry
tags (DIGEST-UNRESOLVED). redis-cache and mongodb-database consumer
shapes are inferred (no prior consumer in the catalog).

Claude-Session: https://claude.ai/code/session_01LrgweAeERJYBg88c5cKDzF

modules/baserow/package.json

@@ -0,0 +1,14 @@
+{
+  "name": "@novox/module-baserow",
+  "version": "0.1.0",
+  "description": "baserow — open-source no-code database. A consumer of a mesh Postgres database and Redis cache, with its own tools (novox/hq ADR 0039).",
+  "type": "module",
+  "private": true,
+  "dependencies": {
+    "@novox/mesh-sdk": "^0.1.0"
+  },
+  "devDependencies": {
+    "@types/node": "^22.0.0",
+    "typescript": "^5.6.0"
+  }
+}