fix: Fix parallel execution of alembic with SQlite

[cbornet]

Fix parallel execution of alembic with SQlite

[codspeed-hq]

CodSpeed Performance Report

Merging #5404 will degrade performances by 52.95%

_{Comparing cbornet:sqlite-alembic (5da3522) with main (bd7f913)}

Summary

⚡ 1 improvements
❌ 1 regressions
✅ 13 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	cbornet:sqlite-alembic	Change
❌	test_load_flows	1.1 ms	2.3 ms	-52.95%
⚡	test_setup_llm_caching	2.9 ms	1.2 ms	×2.5