fix(skit): add missing oneshot + plugin allowlist checks to batch API #1069

Job	Run time
Skit / Test (GPU)	1m 51s
Skit / Test	7m 56s
E2E / Playwright E2E	14m 42s
Skit / Lint (fmt + clippy)	3m 42s
Plugins / Lint (NLLB)	2m 1s
Plugins / Format Check	16s
Plugins / Lint (Simple Plugins)	54s
Plugins / Lint (Whisper)	1m 9s
Skit / Build	10m 59s
UI / Test	23s
UI / Build	22s
Plugins / Lint (Sherpa-ONNX Plugins)	49s
UI / Lint (TypeScript + ESLint)	42s
UI / Knip (unused code)	20s
All Checks Passed	1s
	46m 7s

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