Add long-task governor wrapper MVP skeleton

docs/_artifacts/long_task_governor_wrapper_example.json

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+{
+  "requestText": "Research OpenClawGovernor and report back later.",
+  "hasFilesOrSystems": true,
+  "needsWaiting": true,
+  "needsSubagent": false,
+  "needsOwnerDecision": false,
+  "canReplyNow": false,
+  "taskName": "Research OpenClawGovernor concepts",
+  "currentStep": "Reading source material",
+  "nextStep": "Extract reusable governance ideas",
+  "nextReportCondition": "After the first source review is complete",
+  "waitingOn": "none",
+  "blocker": "none",
+  "checkpointTrigger": "after initial source review completes",
+  "externalizedTrigger": "cron reminder",
+  "triggerKind": "cron"
+}

docs/_artifacts/long_task_governor_wrapper_invalid_silent_example.json

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+{
+  "requestText": "Investigate the Telegram closure issue and report back later.",
+  "hasFilesOrSystems": true,
+  "needsWaiting": true,
+  "needsSubagent": false,
+  "needsOwnerDecision": true,
+  "canReplyNow": false,
+  "taskName": "Investigate Telegram closure issue",
+  "currentStep": "Reviewing recent failures",
+  "nextStep": "Narrow the root cause",
+  "nextReportCondition": "After next meaningful milestone",
+  "waitingOn": "none",
+  "blocker": "none",
+  "checkpointTrigger": "",
+  "externalizedTrigger": "",
+  "triggerKind": ""
+}