Sync prices from the vendors' own sources

[github-actions]

The scheduled run found changes in the vendors' published prices.

Each commit below is one entry, so every diff is the change to that
vendor alone. The last is the global.json version bump — the
published table is version-gated, so without it the app never sees any
of this.

Read it the way the checklist asks: in / out / cache_read against
the vendor's own page. A correct reading reports no change, so
anything here is a source disagreeing with what the entry carries.

Commits

• ca6a457 Bump the version for 1 new
• b10f118 Sync volcesark from its source — 1 new

Full run log

google-gemini  (https://aistudio.google.com/docs/pricing.md)
  ! 26 models with a Standard table, 7 of them in the entry

kimi  (https://platform.kimi.com/docs/pricing/chat.md)
  ! the vendor marks these retired: kimi-k2.5, moonshot-v1-8k, moonshot-v1-32k, moonshot-v1-128k, moonshot-v1-auto, moonshot-v1-8k-vision-preview, moonshot-v1-32k-vision-preview, moonshot-v1-128k-vision-preview, kimi-k2-0905-preview, kimi-k2-0711-preview, kimi-k2-turbo-preview, kimi-k2-thinking, kimi-k2-thinking-turbo

↯ stepfun  (https://platform.stepfun.com/docs/zh/guides/pricing/details.md + https://platform.stepfun.ai/docs/en/guides/pricing/details.md)
  https://platform.stepfun.com/docs/zh/guides/pricing/details.md: fetch failed
  Unreachable from this network, not read. The entry is unchanged.

stepfun-intl  (https://platform.stepfun.com/docs/zh/guides/pricing/details.md + https://platform.stepfun.ai/docs/en/guides/pricing/details.md)
  ! 3/3 rows priced from the vendor's international page

togetherai  (https://docs.together.ai/docs/serverless-models.md)
  ! 6/6 rows priced from the vendor's own docs table

openai  (https://developers.openai.com/api/docs/pricing.md)
  ! 37 priced models in the Standard table, 4 of them in the entry

openrouter  (https://openrouter.ai/api/v1/models + /{id}/endpoints)
  ! 17 of the entry's 20 models priced from their upstreams
  ! priced differently per upstream: deepseek/deepseek-v4.1-flash (22 endpoints, 11 prices), google/gemini-3.8-flash (6 endpoints, 3 prices), z-ai/glm-5.3-flash (30 endpoints, 9 prices), z-ai/glm-5.3 (34 endpoints, 18 prices), deepseek/deepseek-v4-flash-0731 (27 endpoints, 20 prices), anthropic/claude-opus-5 (11 endpoints, 3 prices), moonshotai/kimi-k3 (20 endpoints, 12 prices), openai/gpt-5.6-luna (7 endpoints, 4 prices), openai/gpt-5.6-sol (7 endpoints, 6 prices), tencent/hy3 (6 endpoints, 4 prices), anthropic/claude-sonnet-5 (10 endpoints, 2 prices), z-ai/glm-5.2 (30 endpoints, 17 prices), minimax/minimax-m3 (13 endpoints, 6 prices), deepseek/deepseek-v4-pro (16 endpoints, 13 prices), deepseek/deepseek-v4-flash (15 endpoints, 13 prices), xiaomi/mimo-v2.5 (6 endpoints, 5 prices)
  ! not resolved: deepseek-v4-flash-0731, deepseek-v4.1-flash, gemini-3.8-flash
  ! could not be read this run: deepseek/deepseek-v4.1-flash (no agreed price among 22 upstreams — left as is), google/gemini-3.8-flash (no agreed price among 6 upstreams — left as is), deepseek/deepseek-v4-flash-0731 (no agreed price among 27 upstreams — left as is)

qianwenai  (https://help.aliyun.com/zh/model-studio/billing-for-model-studio)
  ! cache rates are not read: these models are excepted from every published percentage (20% implicit, 10% explicit-hit) and the vendor points at the console instead

volcesark  (https://www.volcengine.com/api/doc/getDocDetail?DocumentID=1544106, https://www.volcengine.com/api/doc/getDocDetail?DocumentID=1925114, https://www.volcengine.com/api/doc/getDocDetail?DocumentID=2366394)
  + kimi-k2.8-preview is new

1 entr(ies) to change: 1 new
1 entr(ies) unreachable from this network — see the ↯ above; nothing is wrong with their pages
no source, still hand-maintained: baidu-qianfan-token-plan, kimi-for-coding, qianwenai-token-plan, tencent-token-plan
✓ wrote entries/volcesark/models.json
✓ bumped global.json version 48 -> 49
✓ committed entries/volcesark/models.json
✓ committed global.json

commits are local; nothing was pushed

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Opened by the sync workflow at the vendors' own sources. Nothing
here is merged automatically.