feat(results): support global per-project results config

[christso]

Summary

Registered Dashboard projects can now use machine-local results repos from $AGENTV_HOME/config.yaml without editing each source repo's .agentv/config.yaml. results_by_project maps project IDs to the existing ResultsConfig shape, while project-local results still wins and top-level global results remains the fallback.

Dashboard remote status, sync, run listing, and remote artifact materialization now carry the registered project id through the shared results helpers. Local eval auto-push also resolves the registered project containing the cwd, so evals launched from a registered source repo use the matching global results mapping.

Evidence

Red on origin/main, same registered project plus global results_by_project only:

{"configured":false,"available":false,"repo":"","local_dir":"","run_count":0}

Green on this branch:

{"configured":true,"available":true,"repo":"EntityProcess/agentv-examples-eval-results","path":"/home/entity/projects/EntityProcess/agentv-examples-eval-results","auto_push":true,"branch_prefix":"eval-results","local_dir":"/home/entity/projects/EntityProcess/agentv-examples-eval-results","run_count":3}

Verification

• bun test packages/core/test/evaluation/loaders/config-loader.test.ts
• bun test ./test/commands/results/serve.test.ts from apps/cli
• bun run typecheck
• bun run lint
• bun run build

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