[tianzhou]

Fix #123

[Copilot]

Pull Request Overview

This PR fixes schema qualifier references by standardizing the schema name from utils to util and removing redundant schema prefixes when objects reference types within their own schema. The changes ensure that dumped schemas use unqualified type references when the type is defined in the same schema, matching PostgreSQL's pg_dump behavior.

Key changes:

• Renamed schema from utils to util for consistency
• Updated code generation to strip schema prefixes from data types, return types, and composite type attributes when they match the target schema
• Restructured tenant schema tests to load the same SQL into public, tenant1, and tenant2 schemas

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
testdata/dump/tenant/util.sql	Renamed schema from utils to util and updated function references
testdata/dump/tenant/tenant.sql	New file containing complete schema definition with cross-schema type references and util function calls
testdata/dump/tenant/public.sql	Removed file - types and tables now defined in tenant.sql instead
testdata/dump/tenant/pgschema.sql	Added type definitions and removed schema qualifiers from type references within the same schema
internal/diff/type.go	Added logic to strip schema prefix from composite type attributes
internal/diff/procedure.go	Updated parameter formatting to strip schema prefixes for target schema
internal/diff/function.go	Updated parameter and return type formatting to strip schema prefixes
cmd/dump/dump_integration_test.go	Restructured test to load tenant.sql into public, tenant1, and tenant2 schemas

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