fix(foundation): collapse nested if statements in gemini sse parser

[Bhanudahiyaa]

Summary

Resolves #1295

This PR fixes 3 clippy::collapsible_if warnings inside crates/mofa-foundation/src/llm/google.rs.

Motivation

To ensure cargo clippy --workspace --all-features passes cleanly without warnings, as per the CONTRIBUTING.md guidelines.

Changes

• mofa-foundation: Collapsed the nested if and if let blocks at lines 448-463 of google.rs into a single compound condition using &&. The underlying logic is completely unchanged.

Related Issues

Resolves #

Testing

• Verified cargo clippy --workspace --all-features -- -D errors passes.
• Verified cargo fmt --check passes.
• Verified cargo test --workspace --all-features passes.

Checklist

• cargo fmt --check passes
• cargo clippy --workspace --all-features -- -D errors passes
• cargo test --workspace --all-features passes
• cargo build --examples succeeds
• cargo doc --workspace --no-deps --all-features succeeds
• Architecture layer rules respected (see CONTRIBUTING.md)
• Relevant documentation updated