Add fail-closed Dolt 2.2.2 support

[TonisOrmisson]

Summary

• add exact fail-closed Dolt 2.2.2 server detection and capability publication
• preflight all source, dictionary, value, non-finite and row-size constraints before DDL
• preserve exact import ownership during compensating cleanup and protect pre-existing datasets
• add pinned Dolt integration coverage and final specification commit pins

Validation

• composer check: 137 tests, 1280 assertions, 9 service skips; syntax, style and PHPStan passed
• exact pinned Dolt 2.2.2 live: 5 tests, 170 assertions
• independent final review: no actionable findings
• final specification commit: 34141dda023d9e0217c37c232e39f436edfb0746