layer.rs: --verbose flag and layers data silently ignored

[noahgift]

Bug

Two underscore-prefixed parameters in layer.rs:

1. trace_layers() at line 83: _verbose: bool — verbose mode unimplemented
2. compare_with_reference() at line 100: _layers: &[LayerTrace] — layer data accepted but never used in comparison

Root Cause

Parameters prefixed with underscore, silently discarded.

Expected Behavior

• --verbose should show additional layer details (tensor stats, weight info)
• compare_with_reference() should use the layers data for actual comparison

Fix

Add warnings for unimplemented features.

Found via kaizen dogfooding audit.

[noahgift]

Triage: P2 — Silent parameter discard. Part of the systematic "silently ignored" bug cluster (GH-510 through GH-534). Needs --strict mode or warning log when flags are accepted but unused. Consider a batch fix: audit all _param prefixed parameters and add warn!() when non-default values are silently discarded.

[noahgift]

Fixed: Both underscore-prefixed parameters now emit warnings. trace_layers() warns when --verbose is passed (layer.rs:85-87). compare_with_reference() warns that layer data comparison is not yet implemented (layer.rs:111-116). Jidoka: user intent acknowledged, not silently discarded.