Declare every module's data; the backup holder measures it (hq ADR 0233)

Backup lines are derived from each module's data section instead of written by hand; the holder
measures declared items, reads the array under them, and deletes a retired item only after a last
restore point; the Go providers say each held consumer's size so an empty replacement is seen.

modules/claude-code/module.json

@@ -56,6 +56,16 @@
     "claude_code_config_status",
     "claude_code_config_import"
   ],
+  "data": {
+    "own": [
+      {
+        "id": "agent-home",
+        "path": "${dir:agent-home}",
+        "class": "valuable",
+        "why": "the operator's agent's own files: its memory, history and projects"
+      }
+    ]
+  },
   "resources": [
     {
       "id": "package",