Add migration to deduplicate connectors and enforce uniqueness

[SachaProbo]

Delete duplicate connectors per (organization_id, provider), keeping the oldest one, then add a unique index to prevent future duplicates.

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Summary by cubic

Deduplicates connectors per organization and provider by keeping the oldest. Adds a unique index to enforce one connector per pair going forward.

• Migration
  • Temporarily set access_sources.connector_id FK to ON DELETE CASCADE, delete newer duplicates (keep oldest by created_at), then restore the FK.
  • Create unique index idx_connectors_organization_id_provider on (organization_id, provider); run during a low-write window due to locks.

^{Written for commit c32aff5. Summary will update on new commits.}

[cubic-dev-ai]

1 issue found across 1 file

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="pkg/coredata/migrations/20260414T125046Z.sql">

<violation number="1" location="pkg/coredata/migrations/20260414T125046Z.sql:18">
P1: Re-link dependent `access_sources` rows before deleting duplicate connectors, otherwise the FK can make this migration fail.</violation>
</file>

_{Reply with feedback, questions, or to request a fix. Tag @cubic-dev-ai to re-run a review.}