Exclude pgstream schema when cleaning up target table

[kvch]

Description

This PR excludes the schema pgstream from dropped objects when clean_target_db is set.
It also prevents dropping triggers of pgstream.

Related Issue(s)

• Fixes Query on full Logical DB Replication without specifying all the tables #736

Type of Change

Please select the relevant option(s):

• 🐛 Bug fix (non-breaking change that fixes an issue)
• ✨ New feature (non-breaking change that adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📚 Documentation update
• 🔧 Refactoring (no functional changes)
• ⚡ Performance improvement
• 🧪 Test coverage improvement
• 🔨 Build/CI changes
• 🧹 Code cleanup

Changes Made

• DROP EVENT TRIGGER is filtered out when clean_target_db is set
• DROP SCHEMA pgstream is filtered out when clean_target_db is set

Testing

• Unit tests added/updated
• Integration tests added/updated
• Manual testing performed
• All existing tests pass

Checklist

• Code follows project style guidelines
• Self-review completed
• Code is well-commented
• Documentation updated where necessary

Additional Notes

Needs manual verification

[github-actions]

Merging this branch will increase overall coverage

Impacted Packages	Coverage Δ	🤖
github.com/xataio/pgstream/pkg/snapshot/generator/postgres/schema/pgdumprestore	89.78% (+0.67%)	👍

---

Coverage by file

Changed files (no unit tests)

Changed File	Coverage Δ	Total	Covered	Missed	🤖
github.com/xataio/pgstream/pkg/snapshot/generator/postgres/schema/pgdumprestore/snapshot_pg_dump_restore_generator.go	85.48% (+2.37%)	365 (+63)	312 (+61)	53 (+2)	👍

Please note that the "Total", "Covered", and "Missed" counts above refer to code statements instead of lines of code. The value in brackets refers to the test coverage of that file in the old version of the code.

Changed unit test files

• github.com/xataio/pgstream/pkg/snapshot/generator/postgres/schema/pgdumprestore/snapshot_pg_dump_restore_generator_test.go