baserow: placed directories, the database password from a file, and the build ace runs

The module named /var/lib/baserow and /services/baserow/data, a layout no
definition may carry (ADR 0112). State and data are now placed directories;
bindings and the grant's secret live in the placed state.

The all-in-one image's entrypoint honours DATABASE_PASSWORD_FILE (file_env
in /baserow.sh), so the grant's password is mounted rather than put in an
env-file, and "secrets-in-environment" is gone (ADR 0086). SECRET_KEY is no
longer minted: the image keeps it, and its JWT signing key, in the data
directory (.secret, .jwt_signing_key) and imports them on start, so a moved
data directory carries the keys its sessions and tokens were made with.
DISABLE_EMBEDDED_PSQL makes a missing grant fail loudly instead of starting
an empty embedded database.

BASEROW_PUBLIC_URL was http://localhost. Baserow answers only the host of
that URL - any other Host is looked up as a published builder site and gets
404, /api/_health/ included - so it is now https://${bound:route:name}
(depends on mesh-controller #149).

The runtime's tools could never have worked: its config was "{}", and the
client's Host override was silently dropped by Node's fetch, so calls by
container name would 404 even with credentials. The client now uses
node:http (which sends the Host it is given, with a Content-Length -
Baserow reads a chunked body as empty) and re-authenticates once when a
cached JWT is refused (access tokens last minutes, the runtime weeks). The
password is the accepted `admin` secret; the email is an assignment
setting merged into the same file, the host is the route's name.

Image pinned to the develop-latest build ace runs today (Baserow 2.3.4,
built 2026-09-18). The old pin (built 2026-09-04) is older than ace's data.

Verified: catalogue tests with MESH_CATALOGUE set; tsc -p tsconfig.json in
the mesh-tools build image. In throwaway containers of the pinned image: a
fresh embedded-PG instance with a user, workspace and 5-row table; stopped,
copied, dumped from the copy (start-only-db); restored with --no-owner
--role into a grant-shaped database on the pgvector image the postgres
module pins (PG17); started with this shape (root 0600 password file,
embedded PSQL disabled, copied data dir without postgres/): health 200,
the user logs in, the 5 rows are there, SECRET_KEY and the JWT key are
imported from the data dir. The patched client lists applications and rows
through the container name with the public Host, and recovers from a
refused token. Test containers and data removed.

modules/baserow/module.json

@@ -18,14 +18,14 @@
     }
   },
   "binds": {
-    "postgres-database": "/var/lib/baserow/database.json",
-    "route": "/var/lib/baserow/route.json"
+    "postgres-database": "${dir:state}/database.json",
+    "route": "${dir:state}/route.json"
   },
   "secrets": {
-    "postgres-database": "/var/lib/baserow/database.secret"
+    "postgres-database": "${dir:state}/database.secret"
   },
   "own-secrets": {
-    "secret-key": "/var/lib/baserow/secret-key.secret",
+    "admin": "${dir:state}/admin.secret",
     "broker": "/var/lib/mesh/baserow/broker"
   },
   "listens": [
@@ -34,7 +34,7 @@
       "port": 80,
       "protocol": "tcp",
       "from": "mesh",
-      "why": "the Baserow web UI and REST API; a public name is a route grant later"
+      "why": "the Baserow web UI and REST API, served by the image's own Caddy; a public name is the route's"
     }
   ],
   "resources": [
@@ -47,22 +47,21 @@
     {
       "id": "state",
       "type": "directory",
-      "path": "/var/lib/baserow",
-      "mode": "0700"
+      "mode": "0700",
+      "place": "."
     },
     {
       "id": "data",
       "type": "directory",
-      "path": "/services/baserow/data",
       "mode": "0755",
       "owner": "9999:9999"
     },
     {
       "id": "server-env",
       "type": "file",
-      "path": "/var/lib/baserow/server.env",
+      "path": "${dir:state}/server.env",
       "mode": "0600",
-      "content": "DATABASE_HOST=${bound:postgres-database:at}\nDATABASE_PORT=${bound:postgres-database:port}\nDATABASE_NAME=${bound:postgres-database:as}\nDATABASE_USER=${bound:postgres-database:as}\nDATABASE_PASSWORD=${secret:postgres-database}\nSECRET_KEY=${secret:secret-key}\nBASEROW_PUBLIC_URL=http://localhost\n"
+      "content": "DATABASE_HOST=${bound:postgres-database:at}\nDATABASE_PORT=${bound:postgres-database:port}\nDATABASE_NAME=${bound:postgres-database:as}\nDATABASE_USER=${bound:postgres-database:as}\nDATABASE_PASSWORD_FILE=/run/secrets/database\nDISABLE_EMBEDDED_PSQL=true\nBASEROW_PUBLIC_URL=https://${bound:route:name}\n"
     },
     {
       "id": "net",
@@ -73,25 +72,25 @@
       "id": "server",
       "type": "container",
       "name": "baserow",
-      "image": "baserow/baserow@sha256:834424a10413798567f76428f255dc259445b7f8dcec56598c05b4073bb2a124",
+      "image": "baserow/baserow@sha256:263ea6c4b72c9eccabcd975ffe9fdebf23913a293a514bec6a3897a5e0a5a080",
       "network": "baserow",
       "env-file": [
-        "/var/lib/baserow/server.env"
+        "${dir:state}/server.env"
       ],
       "ports": [
         "80"
       ],
       "volumes": [
-        "/services/baserow/data:/baserow/data"
-      ],
-      "secrets-in-environment": "baserow reads DATABASE_PASSWORD and SECRET_KEY with os.getenv and has no _FILE twin (settings/base.py); not convertible"
+        "${dir:data}:/baserow/data",
+        "${dir:state}/database.secret:/run/secrets/database:ro"
+      ]
     },
     {
       "id": "runtime-config",
       "type": "file",
       "path": "/var/lib/mesh/baserow/config.json",
       "mode": "0600",
-      "content": "{}\n",
+      "content": "{\n  \"password\": \"${secret:admin}\",\n  \"host\": \"${bound:route:name}\"\n}\n",
       "merge": "json"
     },
     {