[Vanillaxi]

What this PR does:

• Add MySQL AT semantic batch integration tests.
• Verify managed batch commit and duplicate-key rollback.
• Verify caller-owned batch participation in global rollback.
• Register the batch case in the integration test runner.

Which issue(s) this PR fixes:
N/A

The related PR of seata-go

• feat(sql):generic single-transaction batch helper incubator-seata-go#1139
• fix(sql): ensure MySQL semantic batch correctness in AT mode incubator-seata-go#1141

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[Copilot]

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Pull request overview

Adds a new MySQL AT semantic batch integration test case to validate Seata batch execution behavior under managed and caller-owned transaction scenarios, and wires the case into the integration runner.

Changes:

• Register integrate_test/at/batch in the integration test runner script.
• Add managed-batch integration checks for commit success and duplicate-key partial failure handling.
• Add caller-owned transaction integration check that participates in a global rollback and verifies data restoration.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
start_integrate_test.sh	Adds the new AT batch case to the integration test execution list.
integrate_test/at/batch/main.go	Bootstraps the new batch integration suite, DB connection, and scenario execution.
integrate_test/at/batch/managed.go	Implements managed-batch scenarios and shared fixture/assertion helpers.
integrate_test/at/batch/caller_owned.go	Implements the caller-owned transaction scenario and polling helper for rollback verification.
integrate_test/at/batch/Makefile	Adds a local runner target for the new integration case.

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[thunguo]

LGTM