docs(dflash): bump long-context example from 128K to 256K

Merged
DA
5mo ago
+2-2

Summary

  • Updates quickstart long-context example to reflect the 262K ceiling unlocked by TQ3_0 KV cache (merged in #21).
  • Section header: **128K context mode:** ā†’ **Long-context mode (up to 256K):**
  • Example comment: up to 131072 ā†’ up to 262144

Test plan

  • Text-only diff, 1 file, +2/-2
  • Confirm the 262K ceiling holds on RTX 3090 (relying on PR #1 author's claim; not re-verified locally)

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