fix(skit): add missing oneshot + plugin allowlist checks to batch API #1068

Job	Run time
UI / Test	32s
E2E / Playwright E2E	9m 39s
UI / Knip (unused code)	18s
UI / Lint (TypeScript + ESLint)	38s
UI / Build	11s
Skit / Build	9m 40s
Skit / Test	8m 16s
Skit / Test (GPU)	1m 48s
Plugins / Format Check	18s
Plugins / Lint (Simple Plugins)	53s
Skit / Lint (fmt + clippy)	3m 53s
Plugins / Lint (Sherpa-ONNX Plugins)	50s
Plugins / Lint (NLLB)	2m 4s
Plugins / Lint (Whisper)	43s
All Checks Passed	1s
	39m 44s

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