ci: remove sync-docs-to-site workflow (superseded by build-time docs sync)

[Ma77Ball]

Removes the sync-docs-to-site.yml workflow, which pushed committed copies of docs/ into apache/incubator-texera-site (content/docs/latest/) on every push to main.

Why

The website is moving to a build-time docs sync: apache/incubator-texera-site now pulls docs directly from this repo's release/vX.Y branches while building the Hugo site (see the site's scripts/pull-release-docs.sh and updated publish-site.yml). Under that model content/docs/latest/ is generated at build time and git-ignored, never committed.

Keeping this workflow would fight the new setup: it would keep committing docs into content/docs/latest/ on the site repo, which the build-time sync expects to be ignored, build-generated output. Removing it makes the build-time pull the single source of truth.

Rollout note

This should land together with the site's build-time sync going live (and with the release CI firing the docs-updated repository_dispatch the new workflow listens for), since this workflow is currently the only thing keeping the site's docs up to date. Once it's removed, the SITE_SYNC_TOKEN secret it used can be retired.

[github-actions]

Automated Reviewer Suggestions

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

• No candidates found from git blame history.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.68%. Comparing base (4013ca7) to head (475b282).

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #7658   +/-   ##
=========================================
  Coverage     89.68%   89.68%           
  Complexity     4399     4399           
=========================================
  Files          1175     1175           
  Lines         46979    46979           
  Branches       5265     5265           
=========================================
  Hits          42133    42133           
  Misses         3082     3082           
  Partials       1764     1764           

Flag	Coverage Δ		*Carryforward flag
access-control-service	70.00% <ø> (ø)
agent-service	98.62% <ø> (ø)
amber	86.38% <ø> (ø)		Carriedforward from 4013ca7
computing-unit-managing-service	72.46% <ø> (ø)
config-service	77.31% <ø> (ø)
file-service	68.90% <ø> (ø)
frontend	90.70% <ø> (ø)
notebook-migration-service	78.89% <ø> (ø)
pyamber	97.57% <ø> (ø)
workflow-compiling-service	57.89% <ø> (ø)

*This pull request uses carry forward flags. Click here to find out more.

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[github-actions]

⚠️ Benchmark changes need a look

🟢 0 better · 🔴 2 worse · ⚪ 13 noise (<±5%) · 0 without baseline

Compared against main 4013ca7 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	402	0.245	23,003/32,911/32,911 us	🔴 +5.7% / 🔴 +101.3%
⚪	bs=100 sw=10 sl=64	802	0.49	123,062/145,769/145,769 us	⚪ within ±5% / 🔴 +35.5%
⚪	bs=1000 sw=10 sl=64	913	0.557	1,097,402/1,158,713/1,158,713 us	⚪ within ±5% / 🔴 +11.8%

Baseline details

Latest main 4013ca7 from same runner

config	metric	PR	latest main	7d avg	Δ latest	Δ 7d
bs=10 sw=10 sl=64	throughput	402 tuples/sec	420 tuples/sec	774.89 tuples/sec	-4.3%	-48.1%
bs=10 sw=10 sl=64	MB/s	0.245 MB/s	0.257 MB/s	0.473 MB/s	-4.7%	-48.2%
bs=10 sw=10 sl=64	p50	23,003 us	23,288 us	12,738 us	-1.2%	+80.6%
bs=10 sw=10 sl=64	p95	32,911 us	31,136 us	16,348 us	+5.7%	+101.3%
bs=10 sw=10 sl=64	p99	32,911 us	31,136 us	18,848 us	+5.7%	+74.6%
bs=100 sw=10 sl=64	throughput	802 tuples/sec	817 tuples/sec	1,005 tuples/sec	-1.8%	-20.2%
bs=100 sw=10 sl=64	MB/s	0.49 MB/s	0.499 MB/s	0.613 MB/s	-1.8%	-20.1%
bs=100 sw=10 sl=64	p50	123,062 us	120,760 us	100,970 us	+1.9%	+21.9%
bs=100 sw=10 sl=64	p95	145,769 us	148,494 us	107,605 us	-1.8%	+35.5%
bs=100 sw=10 sl=64	p99	145,769 us	148,494 us	116,429 us	-1.8%	+25.2%
bs=1000 sw=10 sl=64	throughput	913 tuples/sec	910 tuples/sec	1,030 tuples/sec	+0.3%	-11.4%
bs=1000 sw=10 sl=64	MB/s	0.557 MB/s	0.555 MB/s	0.629 MB/s	+0.4%	-11.4%
bs=1000 sw=10 sl=64	p50	1,097,402 us	1,095,284 us	991,433 us	+0.2%	+10.7%
bs=1000 sw=10 sl=64	p95	1,158,713 us	1,135,714 us	1,036,668 us	+2.0%	+11.8%
bs=1000 sw=10 sl=64	p99	1,158,713 us	1,135,714 us	1,070,470 us	+2.0%	+8.2%

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
0,10,10,64,20,497.73,200,128000,402,0.245,23003.37,32910.56,32910.56
1,100,10,64,20,2492.27,2000,1280000,802,0.490,123061.68,145768.65,145768.65
2,1000,10,64,20,21899.92,20000,12800000,913,0.557,1097402.46,1158712.84,1158712.84

[Ma77Ball]

Closing as a duplicate: #6948 already removes sync-docs-to-site.yml and additionally wires the docs-updated repository_dispatch into create-release-candidate.yml. Superseded by #6948.