refactor(dashboard): unify query runner metadata into RunnerInfo

[cckellogg]

Changes Made

Replaces the Ray-specific ray_dashboard_url and ray_version fields on query metadata with a single, always-present RunnerInfo struct.

This makes distributed an honest field (false for native) and generalizes the dashboard beyond Ray — the "Open Dashboard" link, version display, and tasks panel now key off runner.distributed instead of sniffing the runner string for "Flotilla".

[github-actions]

Rust Dependency Diff

Head: 2d32fbc3e21b29dd1d974190aaa6b2f62301650b vs Base: ca51c633d13c8d854969405d81f8555e950fecab.

✅ OK: Within budget.

• New Crates: 3
• Removed Crates: 3

Added

• tikv-jemalloc-ctl: 0.7.0
• tikv-jemalloc-sys: 0.7.1+5.3.1-0-g81034ce1f1373e37dc865038e1bc8eeecf559ce8
• tikv-jemallocator: 0.7.0

Removed

• tikv-jemalloc-ctl: 0.6.1
• tikv-jemalloc-sys: 0.6.1+5.3.0-1-ge13ca993e8ccb9ba9847cc330696e02839f328f7
• tikv-jemallocator: 0.6.1

[greptile-apps]

Greptile Summary

This PR replaces the Ray-specific ray_dashboard_url and ray_version flat fields on QueryMetadata with a unified RunnerInfo struct (name, version, distributed, dashboard_url, task_events_enabled), threading the change consistently through Rust types, PyO3 bindings, Python runners, and the React frontend.

• Rust/Python backend: RunnerInfo is introduced in subscribers/mod.rs and mirrored in engine.rs; PyQueryMetadata gains three new getters (distributed, runner_version, task_events_enabled) and the PyO3 constructor is widened with matching keyword arguments.
• Ray runner: distributed=True and task_events_enabled (read from DAFT_TASK_EVENTS_ENABLED) are now explicitly passed; the Daft dashboard and Ray UI URLs are correctly kept as separate local variables.
• Frontend: Tasks-panel visibility moves from a fragile \"Flotilla\" string check to runner.distributed === true; the empty task state now shows a contextual hint when task_events_enabled === false; RunnerInfo is consolidated in types.ts and imported by use-queries.ts.

Confidence Score: 4/5

Safe to merge; the refactor is internally consistent across all layers and the live-query path is fully correct.

The core live-query path from RayRunner through PyQueryMetadata to the dashboard is correctly updated end-to-end. Gaps in event log serialization (distributed and task_events_enabled never written to disk) and the hardcoded import.rs values affect only historical log replay, not live sessions.

daft/subscribers/event_log.py (new fields not written to disk) and src/daft-dashboard/src/import.rs (distributed hardcoded to false, task_events_enabled to None) need attention before the event-log import path is fully correct.

Important Files Changed

Filename	Overview
daft/daft/init.pyi	Stubs updated from Ray-specific fields to generic RunnerInfo fields; new distributed, task_events_enabled, and runner_version parameters added with correct defaults.
daft/runners/ray_runner.py	Correctly renames ray_dashboard_url param to dashboard_url, adds distributed=True and task_events_enabled read from DAFT_TASK_EVENTS_ENABLED env var; both local variables are correctly scoped.
daft/subscribers/event_log.py	Renames ray_version → runner_version reference; new distributed and task_events_enabled fields are not written to the event log, so they are lost on replay.
src/daft-context/src/subscribers/mod.rs	New RunnerInfo struct introduced; flat Ray-specific fields consolidated into it cleanly.
src/daft-context/src/python.rs	PyO3 bindings updated to construct RunnerInfo from individual keyword args; all new getters correctly proxy through runner.*.
src/daft-dashboard/src/import.rs	distributed is hardcoded to false for all imported events (acknowledged in previous review threads; fix pending), and task_events_enabled is also hardcoded to None.
src/daft-dashboard/src/engine.rs	RunnerInfo added as a first-class struct; StartQueryArgs migrated from flat Ray fields; test helpers updated correctly.
src/daft-dashboard/src/state.rs	QuerySummary and QueryInfo both migrated to embed RunnerInfo; serialization is correct.
src/daft-dashboard/frontend/src/app/query/page.tsx	Tasks-panel visibility keyed off runner.distributed instead of Flotilla string sniff; wrap prop added to MetaField for long entrypoints.
src/daft-dashboard/frontend/src/app/query/tasks-sidebar.tsx	Empty-state logic enriched with contextual hint when task_events_enabled === false; runner prop added cleanly.
src/daft-dashboard/frontend/src/app/query/types.ts	RunnerInfo type introduced as the canonical definition; QueryInfo migrated from flat Ray fields to runner: RunnerInfo.
src/daft-dashboard/frontend/src/hooks/use-queries.ts	RunnerInfo now imported from types.ts instead of re-declared; QuerySummary migrated to runner: RunnerInfo.

_{Reviews (2): Last reviewed commit: "fixes" | Re-trigger Greptile}

[cckellogg]

@greptileai

[greptile-apps]

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[codecov]

Codecov Report

❌ Patch coverage is 71.42857% with 16 lines in your changes missing coverage. Please review.
✅ Project coverage is 75.99%. Comparing base (13c1d40) to head (b987131).
⚠️ Report is 36 commits behind head on main.

Files with missing lines	Patch %	Lines
src/daft-context/src/python.rs	68.18%	7 Missing ⚠️
src/daft-dashboard/src/import.rs	0.00%	7 Missing ⚠️
daft/subscribers/event_log.py	50.00%	1 Missing ⚠️
src/daft-context/src/subscribers/debug.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7063      +/-   ##
==========================================
+ Coverage   75.22%   75.99%   +0.76%     
==========================================
  Files        1148     1153       +5     
  Lines      161452   163412    +1960     
==========================================
+ Hits       121456   124188    +2732     
+ Misses      39996    39224     -772     

Files with missing lines	Coverage Δ
daft/runners/native_runner.py	83.20% <ø> (ø)
daft/runners/ray_runner.py	74.00% <100.00%> (+0.11%)	⬆️
src/daft-context/src/subscribers/dashboard.rs	59.19% <100.00%> (+0.36%)	⬆️
src/daft-context/src/subscribers/mod.rs	71.87% <ø> (ø)
src/daft-dashboard/src/engine.rs	67.12% <100.00%> (-1.68%)	⬇️
src/daft-dashboard/src/state.rs	87.17% <ø> (-0.87%)	⬇️
daft/subscribers/event_log.py	71.73% <50.00%> (ø)
src/daft-context/src/subscribers/debug.rs	0.00% <0.00%> (ø)
src/daft-context/src/python.rs	63.39% <68.18%> (-0.64%)	⬇️
src/daft-dashboard/src/import.rs	0.00% <0.00%> (ø)

... and 80 files with indirect coverage changes

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