deps: widen fastapi version constraint for nemoguardrails compatibility

[shayanjm]

Description

Widen the fastapi dependency from ~=0.119.0 (only 0.119.x) to >=0.115.0 to allow
coexistence with nemoguardrails which requires fastapi>=0.103.0.

This follows the NAT's own guideline in pyproject.toml: "Keep package version constraints
as open as possible to avoid conflicts with other packages."

Closes #1449

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Summary by CodeRabbit

• Chores
  • Updated FastAPI dependency constraint to allow broader version compatibility.

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[coderabbitai]

Walkthrough

Updated the FastAPI dependency constraint in pyproject.toml from a compatible-release version specifier (~=0.119.0) to a broader minimum version constraint (>=0.115.0) to allow coexistence with NeMo Guardrails.

Changes

Cohort / File(s)	Summary
Dependency Version Update pyproject.toml	FastAPI version constraint relaxed from ~=0.119.0 to >=0.115.0 to resolve version conflict with NeMo Guardrails

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title is concise, descriptive, uses imperative mood, and accurately summarizes the main change of widening the fastapi version constraint for nemoguardrails compatibility.
Linked Issues check	✅ Passed	The PR directly addresses issue #1449 by widening the fastapi constraint from ~=0.119.0 to >=0.115.0, resolving the dependency conflict that prevented coexistence with nemoguardrails.
Out of Scope Changes check	✅ Passed	The PR contains only the necessary change to resolve the linked issue; the single modification to the fastapi dependency constraint is directly scoped to the stated objective.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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[willkill07]

Suggested change

	"fastapi>=0.115.0", # Widened to support coexistence with nemoguardrails
	"fastapi~=0.119",

This is effectively >=0.119.0,<1.0.0

I don't think we can downgrade at all

[willkill07]

@shayanjm i merged a PR that relaxes several dependencies. Can you confirm if this is still an issue on develop ?

[shayanjm]

Yup that works! Closing this PR now since it's resolved 😄

[willkill07]

Thank you for bringing this to our attention!