fix: restore Groq search compatibility

[stablegenius49]

Summary

• switch Groq structured-output calls to json_object instead of the stricter json_schema helper path
• keep Groq JSON parsing resilient by reusing the existing JSON repair/extraction step
• remove the redundant type argument requirement from the web_search tool schema so Groq/OpenAI-compatible tool calls validate cleanly

Verification

• npx tsc --noEmit
• npx eslint src/lib/models/providers/groq/groqLLM.ts src/lib/agents/search/researcher/actions/webSearch.ts
• npm run build

Closes #980

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Summary by cubic

Restores Groq structured-output and search tool compatibility by switching to resilient JSON parsing and aligning the web search action schema. Closes #980.

• Bug Fixes
  • In GroqLLM.generateObject, request json_object and parse with @toolsycc/json-repair before schema validation.
  • Remove the redundant type field from the web_search action schema to validate with Groq/OpenAI tool calls.

^{Written for commit bf53e59. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 2 files