fix(pyamber): Invalidate cache while loading executor_def.

[Neilk1021]

What changes were proposed in this PR?

This PR calls importlib.invalidate_caches() prior to importing newly written UDF modules in ExecutorManager.load_executor_definition.

Any related issues, documentation, discussions?

Fixes #7126

How was this PR tested?

Tested with existing Python unit tests:

• amber/src/test/python/core/architecture/managers/test_executor_manager.py::TestUpdateExecutor::test_repeated_updates_keep_carrying_the_running_state

Verified that rapid sequential executor updates cleanly load without throwing ModuleNotFoundError.

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

No.

[github-actions]

Backport auto-label report

This fix: PR was checked against each actively-supported release branch. release/* labels drive the post-merge backport, so add or remove one to change where this fix lands.

Release branch	Analysis
✅ release/v1.2	Change detected on this branch — label added; this fix is queued to backport here. Requested review from @xuang7.

Auto-label run.

[github-actions]

Automated Reviewer Suggestions

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

• Contributors with relevant context: @Ma77Ball
  You can notify them by mentioning @Ma77Ball in a comment.

[github-actions]

⚠️ Benchmark changes need a look

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

Compared against main 45b7b20 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	378	0.231	25,848/38,451/38,451 us	🔴 +14.4% / 🔴 +137.4%
⚪	bs=100 sw=10 sl=64	781	0.477	127,291/154,258/154,258 us	⚪ within ±5% / 🔴 +39.2%
🔴	bs=1000 sw=10 sl=64	912	0.557	1,096,088/1,244,057/1,244,057 us	🔴 +10.7% / 🔴 +17.1%

Baseline details

Latest main 45b7b20 from same runner

config	metric	PR	latest main	7d avg	Δ latest	Δ 7d
bs=10 sw=10 sl=64	throughput	378 tuples/sec	407 tuples/sec	765.25 tuples/sec	-7.1%	-50.6%
bs=10 sw=10 sl=64	MB/s	0.231 MB/s	0.248 MB/s	0.467 MB/s	-6.9%	-50.5%
bs=10 sw=10 sl=64	p50	25,848 us	22,587 us	12,703 us	+14.4%	+103.5%
bs=10 sw=10 sl=64	p95	38,451 us	34,502 us	16,199 us	+11.4%	+137.4%
bs=10 sw=10 sl=64	p99	38,451 us	34,502 us	19,557 us	+11.4%	+96.6%
bs=100 sw=10 sl=64	throughput	781 tuples/sec	771 tuples/sec	965.22 tuples/sec	+1.3%	-19.1%
bs=100 sw=10 sl=64	MB/s	0.477 MB/s	0.471 MB/s	0.589 MB/s	+1.3%	-19.0%
bs=100 sw=10 sl=64	p50	127,291 us	125,972 us	103,830 us	+1.0%	+22.6%
bs=100 sw=10 sl=64	p95	154,258 us	162,308 us	110,778 us	-5.0%	+39.2%
bs=100 sw=10 sl=64	p99	154,258 us	162,308 us	118,713 us	-5.0%	+29.9%
bs=1000 sw=10 sl=64	throughput	912 tuples/sec	927 tuples/sec	992.33 tuples/sec	-1.6%	-8.1%
bs=1000 sw=10 sl=64	MB/s	0.557 MB/s	0.566 MB/s	0.606 MB/s	-1.6%	-8.0%
bs=1000 sw=10 sl=64	p50	1,096,088 us	1,077,186 us	1,016,959 us	+1.8%	+7.8%
bs=1000 sw=10 sl=64	p95	1,244,057 us	1,124,134 us	1,062,501 us	+10.7%	+17.1%
bs=1000 sw=10 sl=64	p99	1,244,057 us	1,124,134 us	1,082,611 us	+10.7%	+14.9%

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
0,10,10,64,20,528.70,200,128000,378,0.231,25848.21,38450.79,38450.79
1,100,10,64,20,2561.40,2000,1280000,781,0.477,127291.16,154257.67,154257.67
2,1000,10,64,20,21923.56,20000,12800000,912,0.557,1096087.94,1244057.08,1244057.08

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.37%. Comparing base (02ae12b) to head (ad0464c).
⚠️ Report is 45 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #7173      +/-   ##
============================================
+ Coverage     79.27%   79.37%   +0.10%     
  Complexity     3787     3787              
============================================
  Files          1160     1160              
  Lines         46124    46125       +1     
  Branches       5114     5114              
============================================
+ Hits          36563    36610      +47     
+ Misses         7942     7896      -46     
  Partials       1619     1619              

Flag	Coverage Δ		*Carryforward flag
access-control-service	70.00% <ø> (ø)		Carriedforward from 02ae12b
agent-service	76.76% <ø> (ø)		Carriedforward from 02ae12b
amber	72.60% <ø> (ø)		Carriedforward from 02ae12b
computing-unit-managing-service	20.49% <ø> (ø)		Carriedforward from 02ae12b
config-service	66.66% <ø> (ø)		Carriedforward from 02ae12b
file-service	67.21% <ø> (ø)		Carriedforward from 02ae12b
frontend	83.08% <ø> (ø)		Carriedforward from 02ae12b
notebook-migration-service	78.94% <ø> (ø)		Carriedforward from 02ae12b
pyamber	97.36% <100.00%> (+1.01%)	⬆️
workflow-compiling-service	26.31% <ø> (ø)		Carriedforward from 02ae12b

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

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[Yicong-Huang]

LGTM, thanks

[github-actions]

Backport PR opened: draft #7174 (#7174) to release/v1.2, assigned to @Neilk1021 — needs manual work because the backported tree failed its pre-merge build.