feat(watchdogs): add experimental self-mode watchdogs

- Add enableWatchdogEverything experimental instance setting and UI toggle.
- Add issue_watchdogs.mode and accept mode in the watchdog endpoint.
- Wake task assignees directly for stopped self-mode watchdogs.
- Add first-instruction guidance for assignment-shaped wakes.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

packages/shared/src/validators/issue.ts

@@ -497,6 +497,10 @@ export type CreateIssue = z.infer<typeof createIssueSchema>;
 export const upsertIssueWatchdogSchema = z.object({
   agentId: z.string().uuid(),
   instructions: multilineTextSchema.optional().nullable(),
+  // "subtask" (default) reviews stopped subtrees through a separate watchdog
+  // issue; "self" wakes the watchdog agent directly on the watched issue
+  // (experimental "watchdog everything"). Omitted on update keeps the current mode.
+  mode: z.enum(["subtask", "self"]).optional(),
 }).strict();
 
 export type UpsertIssueWatchdog = z.infer<typeof upsertIssueWatchdogSchema>;