PostgreSQL SET LOCAL only persists within a transaction scope. Added explicit transaction creation if none exists, ensuring tenant context is properly set before queries execute. Fixes tenant isolation for multi-tenant RLS filtering.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
Allow SET LOCAL execution for all database commands by removing the transaction check.
EF Core creates implicit transactions for queries, so SET LOCAL works regardless.
This fixes the issue where read operations without explicit transactions were not getting
tenant context set properly, leading to incorrect RLS filtering and data visibility.
