feat: improve Feishu inbound workflows and connector-scoped automations

[Xke1718He]

Summary

This PR improves connector-based workflows, with a focus on Feishu inbound conversations, connector-scoped automations, and session history management.

What changed

Feishu inbound messaging

• Parse Feishu text, post, image, file, audio, video, share, and interactive messages.
• Download Feishu attachments and preserve them in per-session record directories.
• Pass images and small text-based files into the agent context.
• Support sending Feishu text messages and files.
• Add Feishu interactive approval cards with approve/deny actions.
• Mirror agent progress back to Feishu with acknowledgements, progress updates, reactions, and final responses.
• Validate the source chat before allowing an approval card to resolve an Inbox item.

Persistent inbound sessions

• Persist the mapping between an external connector conversation and an OpenWorker session.
• Reuse the same session for follow-up messages from the same conversation.
• Prevent duplicate session creation when concurrent inbound messages arrive.
• Store connector origin metadata and use it for session titles.
• Add per-connector persona and workspace routing for newly created inbound conversations.
• Preserve the existing persona assignment for already-created sessions.

Connector-scoped automations

• Allow automations to explicitly select their connector data sources.
• Restrict automation connector tools to the configured sources.
• Limit automation connector access to read-only tools where appropriate.
• Add explicit delivery targets for app or connector channels.
• Track delivery status and delivery errors for each automation run.
• Add paginated automation run history and run-count APIs.
• Support clearing selected runs or completed runs older than a retention period.
• Update the scheduling UI with source, delivery, persona, and history controls.

Other improvements

• Improve image attachment handling for multimodal model requests.
• Estimate image token usage without counting the full base64 payload.
• Fix session running-state hydration in the GUI.
• Enable persona selection by default.
• Add regression coverage for automation, connectors, Feishu progress reporting, routing, attachments, and compaction.

Validation

• git diff --check passes.
• python -m compileall -q coworker passes.
• Targeted pytest collection is currently blocked in this environment because the aisuite dependency is not installed.