perf(wgpu): eliminate per-frame allocations in shadow pass (#684) #1320

Job	Run time
Cargo Deny Check	6s
Preflight (Ubuntu Stable)	8s
Integration Build Check	1s
Rust ${{ matrix.rust }} on ${{ matrix.os }}	1s
Codegen Drift Check	1s
CI Success	4s
TS SDK Wasm Build	1s
Native Release Artifact on ${{ matrix.os }}	1s
TS SDK Native on ${{ matrix.os }}	1s
C++ SDK Tests on ${{ matrix.os }}	1s
Swift SDK Tests	1s
Clean Room Regeneration	1s
iOS Build Pipeline	1s
Sandbox Recovery Smoke	1s
Android Build Pipeline	1s
C SDK Tests on ${{ matrix.os }}	1s
Lua SDK Tests	1s
Python SDK on ${{ matrix.os }}	1s
Go SDK Tests	1s
Kotlin SDK Test	1s
.NET SDK on ${{ matrix.os }}	1s
	36s

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