Replace comment-based retry counter with structured metadata

[xliry]

Problem

Retry count is parsed from comment text via regex: comment.body.match(/⚠️ Retry (\d+)\/3/). This is fragile — if a human posts a comment containing "Retry 3/3", the task gets instantly marked as failed. The retry state lives in natural language, not structured data.

What to do

In src/daemon.ts, recoverStaleTasks() function:

1. Instead of parsing retry count from comment text, store it in the issue body as structured metadata
2. Use the existing metadata format: <!-- lota:v1:meta {"retries": 2} -->
3. Update parseMetadata() / formatMetadata() in src/github.ts to support a retries field
4. On recovery: read retries from metadata, increment, write back
5. Remove the regex-based comment scanning

Alternatively, use a simpler approach: store retry count in a label like retry:1, retry:2, retry:3.

Acceptance

• Retry count stored in structured metadata (not comment text)
• Human comments cannot poison the retry counter
• Recovery logic still works correctly (retry 3x then fail)
• Build passes: npm run build

[xliry]

Plan

• Add retries?: number to Task interface in github.ts
• Extract retries in extractFromIssue() from body meta
• Add replaceBodyMeta() helper to safely replace/append meta comment in body
• Add patchTaskMeta() handler + PATCH /tasks/:id/meta route
• In recoverStaleTasks(): remove comment-scanning loop, use task.retries from task list
• Before resetting: call patchTaskMeta to persist incremented retries
• Keep getTask call for workspace cleanup

[xliry]

Completion Report

Replaced fragile comment-scanning retry counter with structured metadata. Retry count is now stored in the issue body as and is immune to human comment content. Added replaceBodyMeta() helper, patchTaskMeta() handler, and PATCH /tasks/:id/meta route in github.ts. Updated recoverStaleTasks() in daemon.ts to read task.retries from the task list and write back via patchTaskMeta before resetting to assigned. Build passes. PR: xliry/lota#5

Modified: src/github.ts, src/daemon.ts

and is immune to human comment content. Added replaceBodyMeta() helper, patchTaskMeta() handler, and PATCH /tasks/:id/meta route in github.ts. Updated recoverStaleTasks() in daemon.ts to read task.retries from the task list and write back via patchTaskMeta before resetting to assigned. Build passes. PR: https://github.com/xliry/lota/pull/5","modified_files":["src/github.ts","src/daemon.ts"]} -->