test(pyright-language-service): add smoke test and CI wiring for pyright bridge

[rbelavadi]

What changes were proposed in this PR?

pyright-language-service has no test coverage today, a dependency bump can pass CI while silently breaking the WebSocket-to-pyright bridge at runtime (e.g. #6176's express upgrade), and the only way to catch that is starting the service by hand.

Adds src/main.smoke.spec.ts: boots the real service as a subprocess and drives it over WebSocket, covering the happy path (diagnostics for a bad file), clean/empty/unicode documents, and negative cases (unknown method, malformed frame, unknown WS path). No source changes, the unknown-path hang is a pre-existing gap in upgradeWsServer, characterized here rather than fixed; follow-up issue to come.

Also fixes a stale comment on the CI job claiming this service has no coverage.

Any related issues, documentation, discussions?

Closes #6193

How was this PR tested?

yarn --cwd pyright-language-service test, 8/8 passing. Wired into .github/workflows/build.yml after the existing typecheck step, so it runs on future PRs automatically.

Was this PR authored or co-authored using generative AI tooling?

Generated-by: Claude Code (Claude Opus 4.8)

[github-actions]

Automated Reviewer Suggestions

Based on the git blame history of the changed files, we recommend the following reviewers:

• Contributors with relevant context: @aglinxinyuan, @renovate-bot
  You can notify them by mentioning @aglinxinyuan, @renovate-bot in a comment.

[rbelavadi]

/request-review @Yicong-Huang

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.03%. Comparing base (a351f44) to head (ff2af0b).
⚠️ Report is 165 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #7293      +/-   ##
============================================
+ Coverage     77.30%   83.03%   +5.72%     
- Complexity     3524     4107     +583     
============================================
  Files          1161     1165       +4     
  Lines         45922    46405     +483     
  Branches       5101     5171      +70     
============================================
+ Hits          35501    38532    +3031     
+ Misses         8840     6170    -2670     
- Partials       1581     1703     +122     

Flag	Coverage Δ
access-control-service	70.00% <ø> (ø)
agent-service	83.65% <ø> (+6.89%)	⬆️
amber	79.99% <ø> (+10.89%)	⬆️
computing-unit-managing-service	43.60% <ø> (+23.11%)	⬆️
config-service	65.97% <ø> (-0.69%)	⬇️
file-service	67.74% <ø> (+0.52%)	⬆️
frontend	83.84% <ø> (+1.26%)	⬆️
notebook-migration-service	78.89% <ø> (-0.06%)	⬇️
pyamber	97.36% <ø> (+5.21%)	⬆️
workflow-compiling-service	26.31% <ø> (-28.84%)	⬇️

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[github-actions]

✅ No material benchmark regressions detected

🟢 7 better · 🔴 0 worse · ⚪ 8 noise (<±5%) · 0 without baseline

Compared against main 7f6402d benchmarked on this same runner, so the delta is largely free of cross-runner hardware noise. The "7d avg" column still reflects the gh-pages dashboard. Treat <±5% as noise unless repeated.

Dashboard · Run

	config	throughput	MB/s	latency	max Δ latest / 7d
🟢	bs=10 sw=10 sl=64	438	0.267	21,703/32,594/32,594 us	🟢 -31.2% / 🔴 +112.5%
🟢	bs=100 sw=10 sl=64	963	0.588	104,122/125,320/125,320 us	🟢 -22.0% / 🔴 +19.1%
⚪	bs=1000 sw=10 sl=64	1,109	0.677	898,351/987,520/987,520 us	⚪ within ±5% / 🟢 -6.8%

Baseline details

Latest main 7f6402d from same runner

config	metric	PR	latest main	7d avg	Δ latest	Δ 7d
bs=10 sw=10 sl=64	throughput	438 tuples/sec	410 tuples/sec	791.9 tuples/sec	+6.8%	-44.7%
bs=10 sw=10 sl=64	MB/s	0.267 MB/s	0.25 MB/s	0.483 MB/s	+6.8%	-44.8%
bs=10 sw=10 sl=64	p50	21,703 us	23,379 us	12,391 us	-7.2%	+75.2%
bs=10 sw=10 sl=64	p95	32,594 us	47,376 us	15,336 us	-31.2%	+112.5%
bs=10 sw=10 sl=64	p99	32,594 us	47,376 us	18,924 us	-31.2%	+72.2%
bs=100 sw=10 sl=64	throughput	963 tuples/sec	965 tuples/sec	1,018 tuples/sec	-0.2%	-5.4%
bs=100 sw=10 sl=64	MB/s	0.588 MB/s	0.589 MB/s	0.622 MB/s	-0.2%	-5.4%
bs=100 sw=10 sl=64	p50	104,122 us	99,628 us	98,925 us	+4.5%	+5.3%
bs=100 sw=10 sl=64	p95	125,320 us	160,574 us	105,265 us	-22.0%	+19.1%
bs=100 sw=10 sl=64	p99	125,320 us	160,574 us	112,729 us	-22.0%	+11.2%
bs=1000 sw=10 sl=64	throughput	1,109 tuples/sec	1,123 tuples/sec	1,051 tuples/sec	-1.2%	+5.5%
bs=1000 sw=10 sl=64	MB/s	0.677 MB/s	0.686 MB/s	0.641 MB/s	-1.3%	+5.5%
bs=1000 sw=10 sl=64	p50	898,351 us	891,933 us	964,104 us	+0.7%	-6.8%
bs=1000 sw=10 sl=64	p95	987,520 us	945,409 us	1,002,343 us	+4.5%	-1.5%
bs=1000 sw=10 sl=64	p99	987,520 us	945,409 us	1,030,483 us	+4.5%	-4.2%

Raw CSV

config_idx,batch_size,schema_width,string_len,num_batches,total_ms,total_tuples,total_bytes,tuples_per_sec,mb_per_sec,lat_p50_us,lat_p95_us,lat_p99_us
0,10,10,64,20,456.94,200,128000,438,0.267,21703.12,32594.39,32594.39
1,100,10,64,20,2076.32,2000,1280000,963,0.588,104122.09,125319.77,125319.77
2,1000,10,64,20,18040.19,20000,12800000,1109,0.677,898351.39,987520.10,987520.10