chore(amber): remove the unused SchemaPropagationResponse

[aglinxinyuan]

What changes were proposed in this PR?

Deletes SchemaPropagationResponse, an orphaned HTTP response model. Pure deletion, no behaviour change: −28 lines.

A repo-wide search for the name returns exactly one hit: the declaration itself. No @Path method returns it, there is no Jackson subtype registration for it, and no frontend interface mirrors it. What remains of the file is a single five-line case class plus the licence header.

Reviewer note: the similarly-named SchemaPropagationFunc in common/workflow-core is unrelated, live, and untouched — only the web/model/http/response case class is removed.

Any related issues, documentation, discussions?

Closes #7450

How was this PR tested?

Existing tests only — this PR adds none; nothing referenced the removed class, so no spec covered it.

Locally, from the repo root with Java 17:

• sbt "WorkflowExecutionService/Test/compile" — success.

Verification, re-runnable by a reviewer:

git grep -n SchemaPropagationResponse    # only the deleted file

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

Generated-by: Claude Code (Claude Opus 5)

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⚠️ Benchmark changes need a look

🟢 0 better · 🔴 1 worse · ⚪ 14 noise (<±5%) · 0 without baseline

Compared against main e03d971 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	21,804/31,206/31,206 us	⚪ within ±5% / 🔴 +93.6%
🔴	bs=100 sw=10 sl=64	914	0.558	107,746/141,042/141,042 us	🔴 +5.1% / 🔴 +26.8%
⚪	bs=1000 sw=10 sl=64	1,079	0.659	922,105/982,415/982,415 us	⚪ within ±5% / 🟢 -10.3%

Baseline details

Latest main e03d971 from same runner

config	metric	PR	latest main	7d avg	Δ latest	Δ 7d
bs=10 sw=10 sl=64	throughput	438 tuples/sec	428 tuples/sec	752.25 tuples/sec	+2.3%	-41.8%
bs=10 sw=10 sl=64	MB/s	0.267 MB/s	0.262 MB/s	0.459 MB/s	+1.9%	-41.8%
bs=10 sw=10 sl=64	p50	21,804 us	22,617 us	13,006 us	-3.6%	+67.6%
bs=10 sw=10 sl=64	p95	31,206 us	32,245 us	16,117 us	-3.2%	+93.6%
bs=10 sw=10 sl=64	p99	31,206 us	32,245 us	19,286 us	-3.2%	+61.8%
bs=100 sw=10 sl=64	throughput	914 tuples/sec	947 tuples/sec	953.66 tuples/sec	-3.5%	-4.2%
bs=100 sw=10 sl=64	MB/s	0.558 MB/s	0.578 MB/s	0.582 MB/s	-3.5%	-4.1%
bs=100 sw=10 sl=64	p50	107,746 us	102,477 us	105,130 us	+5.1%	+2.5%
bs=100 sw=10 sl=64	p95	141,042 us	142,849 us	111,226 us	-1.3%	+26.8%
bs=100 sw=10 sl=64	p99	141,042 us	142,849 us	121,065 us	-1.3%	+16.5%
bs=1000 sw=10 sl=64	throughput	1,079 tuples/sec	1,086 tuples/sec	984.25 tuples/sec	-0.6%	+9.6%
bs=1000 sw=10 sl=64	MB/s	0.659 MB/s	0.663 MB/s	0.601 MB/s	-0.6%	+9.7%
bs=1000 sw=10 sl=64	p50	922,105 us	919,077 us	1,024,295 us	+0.3%	-10.0%
bs=1000 sw=10 sl=64	p95	982,415 us	1,023,054 us	1,062,710 us	-4.0%	-7.6%
bs=1000 sw=10 sl=64	p99	982,415 us	1,023,054 us	1,095,400 us	-4.0%	-10.3%

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
0,10,10,64,20,456.88,200,128000,438,0.267,21804.16,31205.68,31205.68
1,100,10,64,20,2189.07,2000,1280000,914,0.558,107746.01,141042.14,141042.14
2,1000,10,64,20,18527.46,20000,12800000,1079,0.659,922105.33,982415.47,982415.47

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.34%. Comparing base (e03d971) to head (d67ce9f).

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #7453      +/-   ##
============================================
+ Coverage     85.32%   85.34%   +0.01%     
- Complexity     4151     4153       +2     
============================================
  Files          1169     1168       -1     
  Lines         46740    46736       -4     
  Branches       5202     5202              
============================================
+ Hits          39882    39885       +3     
+ Misses         5148     5143       -5     
+ Partials       1710     1708       -2     

Flag	Coverage Δ		*Carryforward flag
access-control-service	70.00% <ø> (ø)		Carriedforward from e03d971
agent-service	85.50% <ø> (ø)		Carriedforward from e03d971
amber	80.92% <ø> (+0.03%)	⬆️
computing-unit-managing-service	50.72% <ø> (ø)		Carriedforward from e03d971
config-service	65.97% <ø> (ø)		Carriedforward from e03d971
file-service	69.05% <ø> (ø)		Carriedforward from e03d971
frontend	87.85% <ø> (ø)		Carriedforward from e03d971
notebook-migration-service	78.89% <ø> (ø)		Carriedforward from e03d971
pyamber	97.51% <ø> (ø)		Carriedforward from e03d971
workflow-compiling-service	26.31% <ø> (ø)		Carriedforward from e03d971

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

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