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/cmd/claude-code/main.go

@@ -388,6 +388,7 @@ func tools(p Paths, servers ServerState, view *ServerView, config ConfigState, c
 		Description: "Read-only: what this node carries of the agent's memory between nodes (novox/hq ADR 0343) — the home kind it carries for (the operator's own homes, or an agent account's), each project's memory files with their fingerprint and the node and time of their last version, the files not carried and why, the conflicts still open (a file changed on two nodes, kept twice in one file, the newer first), and how many replaced or removed versions are kept. Fingerprints only, never the text; it changes nothing.",
 		Run:         func(map[string]any) (any, error) { return memoryCarrier.Status(), nil }})
 	out = append(out, proposalTools(p)...)
+	out = append(out, waitTools(p)...)
 	judge := NewJudge(p)
 	out = append(out, judgeTool(judge), judgedTool(judge))
 	return append(out, configTools(p, config, configView)...)
@@ -463,6 +464,7 @@ func main() {
 	proposing = &Proposing{Store: stateOf{stdio.State(ProposalsState)}, Bus: sdkAskBus{}, Record: recordWarrant,
 		Now: time.Now, Write: writeManaged}
 	go proposing.watch(p)
+	waiting = &Waiting{Store: keptWaits{stdio.State(WaitsState)}, Now: time.Now}
 	memoryCarrier = NewMemoryCarrier(p, memoryStateOf{stdio.State(MemoryState)}, notifyOperator)
 	go memoryCarrier.Run(func(handle func(key, op string, value json.RawMessage, revision uint64) error) error {
 		return stdio.State(MemoryState).Watch("", func(c stdio.StateChange) error {