fix: Fix some blocking usages of messages memory

[cbornet]

Fix some blocking usages of messages memory (functions from langflow/memory.py)

[codspeed-hq]

CodSpeed Performance Report

Merging #4485 will degrade performances by 28.58%

_{Comparing cbornet:async-memory (384383f) with main (f8f9b7c)}

Summary

❌ 1 regressions
✅ 14 untouched benchmarks

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

Benchmarks breakdown

	Benchmark	main	cbornet:async-memory	Change
❌	test_successful_run_with_input_type_text	412 ms	576.8 ms	-28.58%

[ogabrielluiz]

These are sync because put_nowait is sync, IIRC. Should we make them all async? Would make the DX a bit better

[cbornet]

These are fixes for code using functions from langflow/memory.py which uses the DB in a sync way.
We can also add async functions to this module but I think we'll need to keep the sync ones for LCBuiltinChatMemory (or we throw NotImplementedError in the sync methods such as LCBuiltinChatMemory.add_messages ?).