feat: move vault ssh signing into a plugin (C5)

drizzle/sqlite/0051_conscious_blur.sql

@@ -0,0 +1,5 @@
+-- vault_profiles and vault_tokens move to the vault plugin's adopted tables
+-- at activation, and ssh_data.vault_profile_id is copied into the vault
+-- plugin's host settings by a boot migration after this runs. Dropping any
+-- of them here would lose the data first.
+SELECT 1;

drizzle/sqlite/meta/_journal.json

@@ -358,6 +358,13 @@
       "when": 1790295069807,
       "tag": "0050_clear_white_queen",
       "breakpoints": true
+    },
+    {
+      "idx": 51,
+      "version": "6",
+      "when": 1790298803438,
+      "tag": "0051_conscious_blur",
+      "breakpoints": true
     }
   ]
 }