Share daemon init group create flow & related improvements

[justinmoon]

Summary

• Share daemon init group create flow
• Route remaining key package fetches through shared helper
• Extract shared key package interop helpers
• pika-news: add webhook secret for GitHub instant poll wake-up
• Extract shared group create and fix welcome publish
• pikaci: prepared output handoffs + phase 5 decision
• pika-news: add GitHub webhook for instant poll wake-up
• pika-news: move files-changed sidebar to page level
• pika-news: persist auth tokens to SQLite (90-day TTL)
• pikaci: staged fanout + deferred nix targets
• Characterize group create and merge drift

Test plan

• CI passes

🤖 Generated with Claude Code

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⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: c076fcab-be72-444f-837c-01bd625f2420

📥 Commits

Reviewing files that changed from the base of the PR and between 1f78ca0 and a5a3c2c.

📒 Files selected for processing (1)

• crates/pikachat-sidecar/src/daemon.rs

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch openclaw

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 3 additional findings.