fix(opencode): repair missing account.org_id column on startup

[SergioChan]

Issue for this PR

Closes #16378

Type of change

• Bug fix
• New feature
• Refactor / code improvement
• Documentation

What does this PR do?

Some beta users have an existing account table without the newer org_id column, which causes startup queries like active() to fail with SQLiteError: no such column: account.org_id.

This adds a small startup schema repair in Database.Client:

• after normal migrations run, check whether account exists
• if org_id is missing, run ALTER TABLE account ADD COLUMN org_id text

This is idempotent and only applies to affected legacy databases.

How did you verify your code works?

I validated the migration-repair path by code inspection against the issue stack trace and the current beta migration sequence (20260228203230_blue_harpoon introduces org_id).

I could not run the local Bun test/build commands in this environment because bun is not installed in the runner (/bin/bash: bun: command not found).

Screenshots / recordings

Not a UI change.

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR

[github-actions]

Thanks for your contribution!

This PR doesn't have a linked issue. All PRs must reference an existing issue.

Please:

1. Open an issue describing the bug/feature (if one doesn't exist)
2. Add Fixes #<number> or Closes #<number> to this PR description

See CONTRIBUTING.md for details.

[github-actions]

This PR doesn't fully meet our contributing guidelines and PR template.

What needs to be fixed:

• Not all checklist items are checked. Please confirm you have tested locally and have not included unrelated changes.

Please edit this PR description to address the above within 2 hours, or it will be automatically closed.

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[SergioChan]

Thanks for the compliance check. I can't run Bun locally in this environment (bun is unavailable), so I left the local-test checklist item unchecked intentionally and documented the constraint in the PR.\n\nValidation available for this change:\n- reproduction linkage: issue stack trace shows startup failure on missing account.org_id\n- fix scope: startup-only idempotent schema repair when column is missing\n- CI: current PR checks are passing\n\nIf you'd prefer a different checklist handling for constrained environments, I can update the PR description format accordingly.

[github-actions]

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