Smaller LLMs don't always call tools when they should

[dpage]

Smaller LLMs (e.g. some of the Qwen series) don't always call tools when they should, and just tell the user they need to explore the database and quit the loop.

[anilsahoo20]

Tested and verified on snapshot build: https://www.postgresql.org/ftp/pgadmin/pgadmin4/snapshots/2026-03-25/
Package: arm64
Environment: macOS Tahoe 26.4