fix: skip ingest-reply-assist for cron maintenance tasks

[Suidge]

Summary

Fixes #982

Cron maintenance tasks (Daily Memory Distillation, Weekly Synthesis) were being misclassified as transcript-like ingestion and receiving unwanted ingest-reply-assist prompt augmentation.

Problem

When running cron maintenance tasks like:

Daily memory maintenance. Read skills/opencortex/references/distillation.md for full instructions and follow them. Workspace: /path/to/workspace

The plugin would:

1. Misclassify this as a multi-speaker transcript
2. Inject the ingest-reply-assist prompt block
3. Cause the cron task to deviate from its intended behavior

Solution

Added pattern detection in index.ts to identify cron maintenance tasks and skip the ingest-reply-assist injection. The detection checks for:

• [cron:xxx] prefix
• Daily memory maintenance / Weekly synthesis phrases
• References to distillation or weekly-synthesis instruction files
• Workspace: lines

When a cron maintenance task is detected, the plugin logs:

openviking: skipping ingest-reply-assist for cron maintenance task

Testing

Verified in production environment:

• Before fix: ingest-reply-assist applied (reason=transcript_like_ingest, speakerTurns=2, chars=452)
• After fix: skipping ingest-reply-assist for cron maintenance task

The cron tasks now execute correctly without prompt injection.

Changes

• examples/openclaw-plugin/index.ts: Added cron maintenance task detection before isTranscriptLikeIngest() call

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