[codex] remove Batch CLI eval docs

[christso]

Summary

• Remove the Batch CLI evaluation docs pages from current and v4.42.4 docs.
• Remove the Batch CLI example directory and example-list entries.
• Rewrite CLI provider docs to state that AgentV invokes CLI providers once per eval case, with throughput batching owned by adapters/CLIs instead of eval YAML.
• Remove the archived v4.42.4 route entry and update the AI migration reference so it no longer carries batch_requests forward as supported config.

Validation

• bun --filter @agentv/web build
• bun --filter @agentv/web check:routes
• Built-route check: confirmed apps/web/dist/docs/evaluation/batch-cli/index.html and apps/web/dist/docs/v4.42.4/evaluation/batch-cli/index.html are absent.
• rg -n "Batch CLI|batch[_ -]?cli|batch_requests|provider_batching|providerBatching|batchRequests" apps/web/src/content/docs examples skills-data -g '!node_modules' -g '!dist' returned no matches.
• bunx biome check apps/web/src/content/docs/docs/next/evaluation/examples.mdx apps/web/src/content/docs/docs/next/targets/cli-provider.mdx apps/web/src/content/docs/docs/v4.42.4/evaluation/examples.mdx apps/web/src/content/docs/docs/v4.42.4/targets/cli-provider.mdx apps/web/src/data/docs-v4.42.4-routes.json examples/README.md examples/features/README.md skills-data/agentv-eval-migrations/references/breaking-changes.md passed for applicable files.
• git diff --check

bun run validate:examples was also run and failed on an unrelated existing issue in examples/showcase/multi-model-benchmark/evals/benchmark.eval.yaml: evaluate_options.repeat still uses the removed object shape. Follow-up bead: av-7vw3.

Red/Green Evidence

• Red: pre-change audit found public Batch CLI docs and example references under apps/web/src/content/docs and examples/features/batch-cli.
• Green: post-change audit over public docs/examples and AI migration references returns no Batch CLI or eval-batching config references, and the docs build no longer emits Batch CLI docs routes.

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