[ENHANCEMENT] Update deepseek-v4-pro reasoning efforts and mappings

[WHMHammer]

Problem (one or two sentences)

Deepseek just updated their deepseek-v4-pro model to DeepSeek-V4-Pro-0813, which now has the identical reasoning efforts and mappings as DeepSeek-V4-Flash-0731. They have also added the mapping from "medium" to "high".

The latest reasoning effort mappings:

Requested effort	Actual mapped effort
low	low
medium	high
high	high
xhigh	high
max	max

Source: https://api-docs.deepseek.com/guides/thinking_mode

Context (who is affected and when)

Every Deepseek official API user.

Desired behavior (conceptual, not technical)

(check the Problem section)

Constraints / preferences (optional)

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Request checklist

• I've searched existing Issues and Discussions for duplicates
• This describes a specific problem with clear context and impact

Zoo Code Task Links (optional)

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Acceptance criteria (optional)

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Proposed approach (optional)

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Trade-offs / risks (optional)

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