## Why
Users sometimes add screenshots or image references directly to the meeting note while a meeting is in progress. The summary agent should see OCR for those manually added images even when they were not captured through the Meeting Assistant screenshot hotkey.

## What Changes
- Scan the meeting note after transcription and before summarization for Obsidian and Markdown image embeds.
- Add matching image references and OCR output to the assistant context without modifying the meeting note or copying image files.
- Wait for this OCR pass before moving the assistant context into summarization.

## Impact
- Adds a pre-summary screenshot OCR pass over user-authored meeting note image embeds.
- Reuses the existing screenshot OCR client and pending OCR wait path.
- Does not perform crop extraction or attendee updates for meeting-note images.