chore(clippy): fix clippy warnings

[jagan-jaya]

Fix existing clippy warnings across crates

[Copilot]

Pull request overview

This PR addresses existing Clippy warnings across the decision engine and its crates by applying small, semantics-preserving refactors and more idiomatic Rust constructs (aligned with the repo MSRV of Rust 1.85.0).

Changes:

• Replace Option::map_or(true, ...) with Option::is_none_or(...) for clearer intent.
• Simplify numeric bounds checking using inclusive range contains(...).
• Reduce repetition and manual impls via Self::... enum matching and #[derive(Default)] with #[default].

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
src/sr_auto_calibration.rs	Uses is_none_or to simplify “missing value implies changed” logic for calibration updates.
src/decider/gatewaydecider/multi_objective/hypersense_client.rs	Refactors plausibility checks into range-based validation for readability (and stricter handling of non-finite values).
src/analytics/models.rs	Replaces explicit enum type names with Self to satisfy Clippy and reduce verbosity.
crates/gsm/src/types.rs	Removes manual Default impl in favor of derived Default with an explicit #[default] variant.

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