feat: folder shares apply to hosts added later (#1343)

* feat: folder shares apply to hosts added later

Sharing a folder only fanned grants out to the hosts in it at the time.
The share is now also kept as a standing rule on the folder, and a host
created in or moved into it (or a subfolder) inherits the same access
and secret snapshots. Rules follow folder renames and can be stopped
from the share dialog.

* fix: stabilize folder access migrations

drizzle/sqlite/meta/_journal.json

@@ -106,6 +106,13 @@
       "when": 1787600440707,
       "tag": "0014_lean_doctor_octopus",
       "breakpoints": true
+    },
+    {
+      "idx": 15,
+      "version": "6",
+      "when": 1787602476319,
+      "tag": "0015_glossy_shotgun",
+      "breakpoints": true
     }
   ]
 }