[replicate] Add verified model metadata

[rekram1-node]

Scope

• coverage is complete only for the repository's checked-in four-model Replicate discovery inventory
• this is not a comprehensive audit of Replicate's 100+ official model catalog
• three inventory models currently resolve and are included; meta/meta-llama-3.1-405b-instruct returns 404 and is excluded

Reasoning and tools

• deepseek-ai/deepseek-r1: fixed reasoning, reasoning_options = [], and tool_call = false because Replicate's current deployment schema exposes no tools interface
• meta/meta-llama-3-8b-instruct: non-reasoning; reasoning options omitted
• meta/meta-llama-3-70b-instruct: non-reasoning; reasoning options omitted

Evidence

• current Replicate model-specific llms.txt input schemas for all three included deployments
• checked-in Cloudflare AI Gateway Replicate discovery snapshot for the four-model repository inventory and pricing
• current Replicate model URL checks, including the unavailable 405B ID
• generated provider output confirms DeepSeek R1 resolves with tool_call: false

Validation

• bun validate: passed
• bun test packages/core/test/generate.test.ts --test-name-pattern "repository provider JSON": 2 passed
• bun test packages/core/test/generate.test.ts --test-name-pattern "base_model": 3 passed
• git diff --check: passed

The full suite was previously 43 passed with one unrelated baseline open-weight metadata failure reproduced on untouched origin/dev; focused tests covering this update pass.