fix(dolt): reset AUTO_INCREMENT after DOLT_PULL

[cameronraysmith]

Fixes #2133.

This PR adds a resetAutoIncrements function that sets AUTO_INCREMENT = MAX(id) + 1 on all six AUTO_INCREMENT tables after a successful DOLT_PULL. It is applied in both the authenticated and unauthenticated code paths of Pull(), which backs bd dolt pull.

The issue also considered applying the fix after DOLT_MERGE, but testing showed dolt correctly tracks AUTO_INCREMENT for intra-server branch merges. The bug only manifests when rows arrive from a remote via DOLT_PULL, where the server's local counter is not reconciled with the merged data. The previously applied merge fix was dropped since it could not be reproduced.

• TestAutoIncrementAfterPull (integration): source pushes, CLI clone adds AUTO_INCREMENT rows and pushes back, source pulls, verifies post-pull CreateIssue succeeds

Failure without fix

=== RUN   TestAutoIncrementAfterPull
    git_remote_test.go:968: CreateIssue after pull failed (AUTO_INCREMENT not reset?): failed to record creation event: Error 1062 (HY000): duplicate primary key given: [2]
--- FAIL: TestAutoIncrementAfterPull (6.18s)
FAIL