[CPU:Bugfix] Fix issue #4463 large weight offset overflow

[wangzhaode]

Automated rolling sync from the internal MNN development repository.

• Pending commits: 9
• Head branch: sync/ali-to-github
• Commit authors are preserved from the source commits.

Commits

• e0c529b416 [Metal:Bugfix] Fix DFlash SIGSEGV on Metal + fused-attention draft for correctness+speed (incl. shader/dflash.py comment cleanup) — 花熊 zhanghuaxiang.zhx@taobao.com
• c4ab9060b2 [LLM:Bugfix] Fix embedding QNN export paths ([LLM:Bugfix] Fix embedding QNN export paths #4555) — Zeding Zhang me@zedingzhang.com
• 0bf17e3738 [Express:Bugfix] Fix loadMap input tensor losing host buffer ([Express:Bugfix] Fix loadMap input tensor losing host buffer #4733) — fshuang8299 167897122+fshuang8299@users.noreply.github.com
• 0248961dd3 [CPU:Bugfix] Fix Arm82 build without transformer fuse — wangzhaode zhaode.wzd@alibaba-inc.com
• a8478970b9 [Core:Bugfix] Fix model-loading leaks and image-process boundaries (fix: free Content object in error paths of loadModelFile/createFromBuffer #4384) — Srikanth Patchava srikanth.patchava@outlook.com
• 8298424b68 [OpenCL:Bugfix] Fix Eagle3 KVCache reserve logic ([OpenCL:Bugfix]fix: correct KVCache reserve logic and stride alignment in Eagle3 for opencl #4738) — huluhuluu hustzjh@hust.edu.cn
• ff26078b63 [CPU:Bugfix] Fix dirty data reduction in RVV AccumulateSequence ([CPU:Bugfix] Fix dirty data reduction in RVV AccumulateSequence #4590) — ihb2032 40718643+ihb2032@users.noreply.github.com
• 9c338656d1 [LLM:Feature] Add HunyuanOCR 1.5 support ([LLM:Feature] Add HunyuanOCR 1.5 support #4625) — xly xlycae@126.com
• 1b2466ad1e [CPU:Bugfix] Fix issue gemma-3-4b-it-q4_0-mnn: SIGSEGV in libMNN on Snapdragon 8 Gen 2 (MnnLlmChat 0.8.3 + master) #4463 large weight offset overflow — wangzhaode zhaode.wzd@alibaba-inc.com

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✅ fshuang8299
✅ srpatcha
✅ wangzhaode
✅ ZedingZhang
✅ ihb2032
✅ Fatemanx
✅ huluhuluu
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