feat(wsl-mover): report how a move's undo ends (#35322)

* feat(wsl-mover): report how a move's undo ends (wsl_move_undo)

* fix(wsl-mover): tell a thrown undo apart from a failed one; clamp its duration

src/shared/telemetry-event-registry.ts

@@ -112,7 +112,11 @@ import {
   sshHostServerMoveSchema,
   sshHostServerLegacyRelayBridgeSchema
 } from './telemetry-ssh-host-server-event-schemas'
-import { wslMoveOrchestratorSchema, wslMoveSchema } from './telemetry-wsl-move-event-schemas'
+import {
+  wslMoveOrchestratorSchema,
+  wslMoveUndoSchema,
+  wslMoveSchema
+} from './telemetry-wsl-move-event-schemas'
 
 // Breaking payload changes require a new event name to keep historical rows distinguishable; optional additions are safe.
 export const eventSchemas = {
@@ -228,6 +232,7 @@ export const eventSchemas = {
 
   wsl_move: wslMoveSchema,
   wsl_move_orchestrator: wslMoveOrchestratorSchema,
+  wsl_move_undo: wslMoveUndoSchema,
 
   wsl_usage_snapshot: wslUsageSnapshotSchema
 } as const

src/shared/telemetry-wsl-move-event-schemas.ts

@@ -117,3 +117,26 @@ export const wslMoveOrchestratorSchema = z
     attempt_bucket: z.enum(WSL_MOVE_ORCHESTRATOR_ATTEMPT_BUCKETS)
   })
   .strict()
+
+/** How "use this project here again" ended; refusals keep the result's own reason. */
+export const WSL_MOVE_UNDO_OUTCOME_VALUES = [
+  'released',
+  'not_moved',
+  'superseded',
+  'move_running',
+  'host_still_running',
+  'host_unreachable',
+  'unsaved_files',
+  'failed',
+  // The undo threw instead of returning a refusal.
+  'threw',
+  'other'
+] as const
+
+// Same enum-only rule as `wsl_move`: no distro, project or migration id leaves.
+export const wslMoveUndoSchema = z
+  .object({
+    outcome: z.enum(WSL_MOVE_UNDO_OUTCOME_VALUES),
+    duration_bucket: z.enum(SSH_RUNTIME_DURATION_BUCKETS)
+  })
+  .strict()