feat(core): normalize public providers schema

[christso]

Summary

• add public authored providers support and normalize providers[].id/label into the existing internal target model
• hard-error removed public targets, suite/assertion target fields, defaults.target, and graders with migration guidance
• support Promptfoo-style colon provider specs, Promptfoo Codex IDs, AgentV-native agentv:codex-cli, and migrate the repo-local provider catalog

Validation

• bun test packages/core/test/evaluation/loaders/config-loader.test.ts packages/core/test/evaluation/providers/targets-file.test.ts packages/core/test/evaluation/loaders/grader-parser.test.ts packages/core/test/evaluation/eval-inline-experiment.test.ts packages/core/test/evaluation/validation/eval-file-schema.test.ts packages/core/test/evaluation/validation/eval-validator.test.ts packages/core/test/evaluation/validation/targets-validator.test.ts packages/core/test/evaluation/providers/targets.test.ts
• bunx biome check <changed source/test/schema files>
• bun --filter @agentv/core typecheck
• bun --filter agentv typecheck
• bun apps/cli/src/cli.ts validate .agentv/targets.yaml
• post-catalog focused rerun: bun test packages/core/test/evaluation/providers/targets-file.test.ts packages/core/test/evaluation/validation/targets-validator.test.ts packages/core/test/evaluation/providers/targets.test.ts packages/core/test/evaluation/loaders/config-loader.test.ts
• git diff --check

Dogfood

Attempted live dogfood after copying .env from the primary checkout. The run reached provider invocation, but OPENAI_API_KEY in the copied env resolves to dummy, so OpenAI returned HTTP 401. This PR remains draft until a live provider + real LLM grader run is completed with real credentials.

Follow-up

• Promptfoo export/transpile should lower AgentV-only agentv:codex-cli to a generated TS file://...:callApi provider or a complete package provider id such as package:@agentv/promptfoo-providers:CodexCliProvider, not shell/sh exec wrappers.

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View logs

[christso]

CI follow-up pushed in b3130d34.

Root cause fixed: stale generated eval bundles, rerun override catalogs, TS eval lowering, CLI tests, and example eval YAML still authored old target/targets shapes after the public providers schema break.

Local validation:

• bun test packages/core/test/evaluation/interpolation-integration.test.ts packages/core/test/evaluation/yaml-parser-metadata.test.ts packages/core/test/evaluation/validation/config-validator.test.ts packages/core/test/evaluation/loaders/ts-eval-loader.test.ts - 63 pass
• bun test apps/cli/test/eval.integration.test.ts apps/cli/test/commands/grade/grade-prepared.test.ts apps/cli/test/commands/runs/rerun.test.ts apps/cli/test/commands/prepare/prepare.test.ts apps/cli/test/commands/eval/bundle.test.ts apps/cli/test/commands/eval/targets.test.ts apps/cli/test/commands/validate/validate-files.test.ts - 62 pass
• bun test apps/cli/test/commands/eval/artifact-writer.test.ts apps/cli/test/commands/eval/task-bundle.test.ts - 76 pass
• bun test apps/cli/test/commands/validate/validate-files.test.ts - 6 pass
• bun run test - passed across workspace
• bun run typecheck - passed
• bun run build - passed
• bun run lint - passed
• bun run validate:examples - Total 109, Valid 109, Invalid 0
• rg -n "^target:\s*|^targets:" examples --glob '*.{yaml,yml}' - no matches
• git diff --check - clean

Live dogfood:

• Used local proxy at http://127.0.0.1:10531/v1 with explicit OPENAI_BASE_URL, OPENAI_ENDPOINT, LOCAL_OPENAI_PROXY_BASE_URL, OPENAI_API_KEY=dummy.
• Temp eval used public providers, defaults.provider, provider catalog labels candidate/grader, and assertion-level provider: grader.
• Command: bun apps/cli/src/cli.ts eval run tmp-av-ctfu-provider-dogfood.eval.yaml --targets tmp-av-ctfu-providers.yaml --output /tmp/agentv-av-ctfu-provider-dogfood-results --no-results-push --workers 1
• Result: PASS, 1/1 scored >= 80%, summary at /tmp/agentv-av-ctfu-provider-dogfood-results/summary.json with passed_tests: 1, failed_tests: 0, target candidate.

Fresh CI is running on commit b3130d34.