Keep a session's wait list in the claude-code module (issue 1629)

A session can end its turn while an Approve it expects is still open and
nothing then watches it. claude_code_wait (add/watched/done/said/list)
keeps each session's waits in the module's waits state, keyed by its
session id and node, and mirrors them whole and atomically to a file
under the agent's home that the plugin's coming hooks (1743, 1744) will
read without calling back into this module.

modules/claude-code/module.json

@@ -28,7 +28,8 @@
     "config",
     "proposals",
     "questions",
-    "memory"
+    "memory",
+    "waits"
   ],
   "reads": [
     "claude-licence-manager.bindings"
@@ -67,6 +68,7 @@
     "claude_code_proposals",
     "claude_code_ask",
     "claude_code_answer",
+    "claude_code_wait",
     "claude_code_settings_get",
     "claude_code_settings_set",
     "claude_code_settings_clear",