Identify method allocator usage optimizations via runtime memory profiling

[rascani]

Description

Leverage runtime memory profiling (from H1 P0 work) to identify and implement optimizations reducing method allocator footprint.

Acceptance Criteria

• Memory profiling data collected for TinyML models on Cortex-M
• Optimization opportunities identified and at least 2 implemented
• Measurable reduction in method allocator usage documented