Issue 4423 replace properties tx clean

[kazuhidelee]

Summary

ReplaceAllProperties runs a delete followed by a series of upserts. Before the change, if no transaction was provided with opts, getStoreOrTransaction returned the plain store and Postgres ran each statement in autocommit mode. so a failed upsert in middle would leave the entity with no properties at all.
The fix wraps the delete/insert sequence in a transaction when the caller hasn't already provided one, and reuses the existing querier when they have.

To keep the code organized and avoid duplication, I used helper functions for this implementation:

• replaceAllPropertiesWithQuerier() for the delete-then-reinsert sequence
• saveAllPropertiesWithQuerier() for the shared property upsert loop

Fixes #4423

Testing

New tests cover:

• transaction is opened when called with plain store
• existing transaction querier is reused
• transaction wrapper errors surface correctly
• original properties are preserved when a mid-reinsertion failure triggers rollback.

[coveralls]

coverage: 59.417% (-0.001%) from 59.418% — kazuhidelee:issue-4423-replace-properties-tx-clean into mindersec:main