(feature): add initial Runs dashboard

[krisztianfekete]

This PR adds a dashboard to be able to explore historical evaluations backed by PG.

Fixes #140

[Copilot]

Pull request overview

Adds an initial “Run history” dashboard to the UI, backed by the durable Postgres run storage, and extends the backend + streaming pipeline so runs can be grouped and trended over time (including stable agent identity via service.name).

Changes:

• Add a new Runs dashboard view (list + charts + per-run detail) powered by GET /api/runs and GET /api/runs/{id}/results.
• Track and propagate a “golden/reference trace” so it’s plotted in performance charts but excluded from pass/fail scoring.
• Persist richer run summaries (per-metric aggregates + agent identity) and ensure service.name survives streaming trace serialization.

Reviewed changes

Copilot reviewed 30 out of 30 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
ui/src/lib/types.ts	Adds persisted run-history types (Run, RunSummary, RunResultRow, etc.) and wires runs into ViewType.
ui/src/context/TraceProvider.tsx	Adds goldenTraceId to state and clears it on clearResults; exposes setGoldenTraceId.
ui/src/context/TraceContext.tsx	Extends TraceState/actions with goldenTraceId + setter.
ui/src/config.ts	Adds /api/runs endpoint URL.
ui/src/components/streaming/LiveStreamingView.tsx	Includes golden trace in uploaded traces and records goldenTraceId for later scoring/chart behavior.
ui/src/components/sidebar/Sidebar.tsx	Adds “Run History” navigation item and sidebar section mapping for the runs view.
ui/src/components/runs/RunsView.tsx	New Runs dashboard page: load runs, group/filter, show summary stats + trend charts + table + drill-in.
ui/src/components/runs/RunsHistoryTable.tsx	New table rendering run rows with status, group keys, pass rate bar, duration, and models.
ui/src/components/runs/runHistory.ts	New helpers for grouping, pass rate/duration formatting, frequency-based legends, and status/chart colors.
ui/src/components/runs/RunDetailView.tsx	New per-run detail view showing configuration, per-case results, and persisted tool-trajectory diffs.
ui/src/components/runs/PerMetricTrendChart.tsx	New chart.js per-metric avg score trends across runs.
ui/src/components/runs/PassRateTrendChart.tsx	New chart.js pass-rate trends (per agent line where available).
ui/src/components/dashboard/TraceTable.tsx	Adds trajectory-diff badge and expands rows to show tool-trajectory mismatch details.
ui/src/components/dashboard/PerformanceCharts.tsx	Labels/sorts the golden trace as “(reference)” and prioritizes it in chart ordering.
ui/src/components/dashboard/DashboardView.tsx	Excludes golden trace from scoring/table rows while still passing it to performance charts for plotting.
ui/src/App.tsx	Routes the new runs view to RunsView.
ui/src/api/client.ts	Adds listRuns, getRun, getRunResults plus a StorageUnavailableError for 503 durable-storage gating.
src/agentevals/trace_metrics.py	Extracts stable agent identity using service.name (with fallback) and adds it to extracted metadata.
src/agentevals/trace_attrs.py	Introduces OTEL_SERVICE_NAME = "service.name" constant.
src/agentevals/streaming/ws_server.py	Re-attaches service.name resource attribute onto each span when serializing JSONL traces.
src/agentevals/runner.py	Adds service_name/agent_name onto TraceResult using extract_agent_identity.
src/agentevals/run/result_builder.py	Ensures summary/result status mapping consistency; adds per-metric aggregates and agent list to persisted run summary.
src/agentevals/api/streaming_routes.py	Persists “evaluate sessions” streaming runs when durable storage is configured; reuses canonical trace serializer for /get-trace.
examples/zero-code-examples/strands/run.py	Sets OTEL_SERVICE_NAME by default for stable run grouping.
examples/zero-code-examples/pydantic-ai/run.py	Sets OTEL_SERVICE_NAME by default for stable run grouping.
examples/zero-code-examples/openai-agents/run.py	Sets OTEL_SERVICE_NAME by default for stable run grouping.
examples/zero-code-examples/ollama/run.py	Sets OTEL_SERVICE_NAME by default for stable run grouping.
examples/zero-code-examples/langchain/run.py	Sets OTEL_SERVICE_NAME by default for stable run grouping.
examples/zero-code-examples/adk/run.py	Sets OTEL_SERVICE_NAME by default for stable run grouping.
examples/dice_agent/agent.py	Updates the example agent model identifier.

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