* feat(guardrails): add Wingback guardrail integration
Mirrored from #38685 at d73b66544d (net diff against its merge base, applied on main)
* fix(guardrails): dispatch Wingback through the unified guardrail
The proxy only runs a unified guardrail when apply_guardrail is defined on
the guardrail's own class, so WingbackGuardrail now binds the parent's
decorated method in its class body. Chat, messages and responses pre, post
and during call checks reach Wingback again, and each check logs once.
Also types the initializer and config model for the lint gates and uses
monkeypatch.setenv in the unit test
* chore(guardrails): drop the Wingback dispatch comment
The unit and integration hook tests already fail when the apply_guardrail binding is removed, so the comment is redundant under the repo comment rule
---------
Co-authored-by: bsk-wb <bharath@wingback.ai>
Co-authored-by: yucheng-berri <293926326+yucheng-berri@users.noreply.github.com>
c3ca8a5140