Run WASM sessions at the default graph optimization level now that ort-web 1.31 loads the 8-bit decoders

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/WorkBreakdown.md

@@ -342,6 +342,8 @@ cached.
 ## M8 — Transcription quality and speed (spec 001)
 - [x] Transformers.js 4.2.0 → 4.3.2, sequential-session patch regenerated
       for 4.3.2 and guarded by `tests/transformers-runtime.test.ts` (D-WS1a).
+- [x] WASM sessions back at the default graph optimization level: ort-web
+      1.31.0-dev loads the q8 decoders at every level (D-WS1c supersedes D-014).
 
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