fix(search): validate Notion search terms before dispatch

[waleedlatif1]

Summary

• Reject empty Notion native queries before dispatch, including date-bounded and sorted requests.
• Validate Notion-only live listings and return actionable argument errors while preserving supported date-only and mixed-provider searches.
• Regenerate the shared worker contract and search guidance.

Companion: https://github.com/simstudioai/mothership/pull/544

Type of Change

• Bug fix

Testing

• 252 provider and retrieval tests passed; 51 focused tests passed again after restoring each mutation control.
• Three independently removed guards made their named regression tests fail; the original worker validator also reproduced the bug before regeneration.
• Type checks across 26 workspaces, lint, all 51 audits, block registry, docs manifest and contract-generation checks passed.
• Validation uses synthetic fixtures; no fresh external-account or live-model acceptance is claimed.

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing (new tests pass the test-audit authoring gate)
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

[vercel]

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1 Skipped Deployment

Project	Deployment	Actions	Updated
docs	Skipped		Sep 28, 2026 1:06am UTC

[cubic-dev-ai]

No issues found across 9 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

_{Re-trigger cubic}

[greptile-apps]

Confidence Score: 5/5

[Medium risk] Adds validation for Notion search queries.

The PR appears safe to merge; no actionable regression was established.

Summary

The PR adds explicit validation for empty Notion native queries and Notion-only live listings, surfaces a more actionable argument error, and updates generated contracts and search guidance.

_{Reviews (1) · Last reviewed commit: "fix(search): validate Notion search term..."}

[github-actions]

⚠️ Cross-repo companion check

One or more companion PRs aren't merged into staging yet. Merging this without them will leave copilot and sim out of sync — merge them in lockstep.

• ❌ simstudioai/mothership#544 — OPEN, not merged (targets staging) — fix(search): reject empty Notion queries before dispatch