[Bug] Inline PR review comments drop author_association, leaving label actor roles unresolved

[volcano303]

Description

The mirror ingests pull_request_review_comment webhook events into review_comments, but it drops GitHub's comment.author_association field.

GitHub pull request review comment objects include author_association, but the current mirror schema, entity, and handler only store:

• reviewer id
• reviewer login
• review id
• path/line/side/body
• timestamps

As a result, inline diff review comments cannot contribute maintainer/member role evidence to contributor_repo_roles.

This matters because pr_labels_by_actor and issue_labels_by_actor resolve label actor_association through contributor_repo_roles, and miner API responses expose that value.

Steps to Reproduce

1. Process a pull_request_review_comment.created webhook where payload.comment.author_association = 'MEMBER'.
2. Ensure that actor has no other stored association evidence in the repo:
   • no authored PR row
   • no authored issue row
   • no submitted review row
   • no issue/PR thread comment row
3. Process a label event where the same actor applies a label to a PR or issue.
4. Query pr_labels_by_actor or issue_labels_by_actor.

Expected Behavior

The inline review comment should preserve the actor's GitHub association, and label actor role resolution should be able to use it.

The label row should expose actor_association = 'MEMBER' or the equivalent GitHub association value.

Actual Behavior

review_comments stores no association field, so the actor has no usable role evidence from the inline review comment. The label row can return actor_association = null.

Environment

• OS: Any
• Runtime/Node version: Node 20
• Browser (if applicable): N/A

Additional Context

Affected code:

• packages/das/src/webhook/handlers/review-comment.handler.ts
• packages/das/src/entities/ReviewComment.entity.ts
• packages/db/06_review_comments.sql
• packages/db/20_view_contributor_repo_roles.sql
• packages/db/24_view_pr_labels_by_actor.sql
• packages/db/25_view_issue_labels_by_actor.sql

GitHub references:

• pull_request_review_comment is the webhook event for PR diff comments: https://docs.github.com/en/webhooks/webhook-events-and-payloads#pull_request_review_comment
• Pull request review comment objects include author_association: https://docs.github.com/en/rest/pulls/comments?apiVersion=2022-11-28

This is distinct from #13/#14. That fix added submitted PR reviews and issue/PR thread comments as role evidence, but inline PR review comments remain excluded because their author_association is never stored.