fix(sqllab): async queries no longer stuck at Running forever

[sadpandajoe]

fix(sqllab): async queries no longer stuck at Running forever

SUMMARY

REFRESH_QUERIES's stale-poll guard in the SQL Lab reducer discarded any
incoming Success update whenever the locally stored query state was
Running, Fetching, or Success. Guarding Fetching/Success makes
sense (a late-arriving poll response shouldn't clobber a state that's
already at or past Success), but Running is strictly before
Success in the query lifecycle, so an incoming Success while local
state is Running is genuine new information, not a stale duplicate.

For async-mode queries (databases with allow_run_async enabled), the
periodic background poller (QueryAutoRefresh dispatching
REFRESH_QUERIES) is the only mechanism that ever updates their state
client-side — runQuery only dispatches querySuccess directly for the
synchronous case. Once such a query was observed in Running, it could
never reach Success: every subsequent poll re-applied the same guard
against the same locally-stuck prevState, so the query appeared
permanently "running" in the UI (e.g. the SQL Lab Query History pane)
even though it had long since finished on the backend.

This drops Running from the blocked-state list so a genuine
Running -> Success transition is no longer discarded, while keeping the
Fetching/Success guard intact for its original purpose.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

N/A. Behavior-only SQL Lab reducer fix (async query status polling); no
visual/layout change.

TESTING INSTRUCTIONS

1. Run a query against a database with allow_run_async enabled.
2. Confirm the query correctly transitions from "Running" to "Success" in
   the UI (e.g. Query History) once the backend job completes, instead of
   remaining stuck at "Running" indefinitely.

Automated/local checks run:

• npx jest src/SqlLab/reducers/sqlLab.test.ts (new + existing tests, 39/39 pass)
• npx jest src/SqlLab/ (full directory, 45 suites / 423 passed, 1 pre-existing skip)
• npx oxlint --config oxlint.json --quiet on changed files (clean)
• npx oxfmt --check on changed files (clean)

ADDITIONAL INFORMATION

• Has associated issue
• Required feature flags: SQLLAB_BACKEND_PERSISTENCE is not required;
  reproduction requires a database with allow_run_async enabled
• Changes UI
• Includes DB Migration
• Introduces new feature or API
• Removes existing feature or API

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 66.38%. Comparing base (91b1a6c) to head (2f88576).
⚠️ Report is 5 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #42896   +/-   ##
=======================================
  Coverage   66.38%   66.38%           
=======================================
  Files        2857     2857           
  Lines      161133   161133           
  Branches    37064    37064           
=======================================
+ Hits       106967   106968    +1     
+ Misses      52147    52146    -1     
  Partials     2019     2019           

Flag	Coverage Δ
javascript	73.19% <100.00%> (+<0.01%)	⬆️

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