[Stack 1/17] CI: add concurrency group to E2E workflow; run CI on spr/ branches

[jucor]

When spr force-pushes all stack branches at once, each branch triggers
a new E2E run while the previous one is still queued. The concurrency
group (keyed on branch ref) cancels the stale run, cutting the number
of concurrent E2E jobs roughly in half.

Also add spr/** to the branch filters in python-ci, jest-server-test,
and cypress-tests workflows so spr-managed PRs get the same CI coverage
as jc/** branches.

commit-id:1a8eb714

---

Stack:

• [Stack 17/17] Fix K-means k divergence: preserve vote-encounter row order #2524
• [Stack 16/17] Fix D15: match Clojure moderation handling (zero out columns, don't remove) #2523
• [Stack 15/17] Fix D8: match Clojure repful classification (rat > rdt) #2522
• [Stack 14/17] Fix D7: match Clojure repness metric formula (product of 4 signed values) #2521
• [Stack 13/17] Fix D6: match Clojure two-proportion test formula (+1 pseudocount) #2520
• [Stack 12/17] Fix D5: match Clojure prop_test formula (Wilson-score-like with +1 pseudocount) #2519
• [Stack 11/17] Fix D9: z-score thresholds from two-tailed to one-tailed #2518
• [Stack 10/17] Fix test DB connection: use DATABASE_URL with dotenv #2517
• [Stack 9/17] Vectorize participant info computation (3-15x speedup) #2516
• [Stack 8/17] Speed up regression tests #2515
• [Stack 7/17] Fix D4: pseudocount formula #2514
• [Stack 6/17] Fix D2: in-conv participant threshold + D2c vote count source #2513
• [Stack 5/17] Per-discrepancy test infrastructure #2512
• [Stack 4/17] Deep analysis of Python-Clojure discrepancies and fix plan #2511
• [Stack 3/17] Speed up CI: replace pip with uv pip in Dockerfile (~2x faster installs) #2510
• [Stack 2/17] Add SKIP_GOLDEN env var to disable golden snapshot tests #2509
• [Stack 1/17] CI: add concurrency group to E2E workflow; run CI on spr/ branches #2508 ⬅

---

⚠️ Part of a stack created by spr. Do not merge manually using the UI - doing so may have unexpected results.

[github-actions]

Delphi Coverage Report

File	Stmts	Miss	Cover
init.py	2	0	100%
benchmarks/bench_pca.py	76	76	0%
benchmarks/bench_repness.py	81	81	0%
benchmarks/bench_update_votes.py	38	38	0%
benchmarks/benchmark_utils.py	34	34	0%
components/init.py	1	0	100%
components/config.py	165	133	19%
conversation/init.py	2	0	100%
conversation/conversation.py	1118	336	70%
conversation/manager.py	131	42	68%
database/init.py	1	0	100%
database/dynamodb.py	387	233	40%
database/postgres.py	305	205	33%
pca_kmeans_rep/init.py	5	0	100%
pca_kmeans_rep/clusters.py	257	22	91%
pca_kmeans_rep/corr.py	98	17	83%
pca_kmeans_rep/pca.py	52	16	69%
pca_kmeans_rep/repness.py	361	48	87%
pca_kmeans_rep/stats.py	107	22	79%
regression/init.py	4	0	100%
regression/clojure_comparer.py	188	17	91%
regression/comparer.py	887	464	48%
regression/datasets.py	103	22	79%
regression/recorder.py	36	27	25%
regression/utils.py	137	38	72%
run_math_pipeline.py	260	114	56%
umap_narrative/500_generate_embedding_umap_cluster.py	210	109	48%
umap_narrative/501_calculate_comment_extremity.py	112	54	52%
umap_narrative/502_calculate_priorities.py	135	135	0%
umap_narrative/700_datamapplot_for_layer.py	502	502	0%
umap_narrative/701_static_datamapplot_for_layer.py	310	310	0%
umap_narrative/702_consensus_divisive_datamapplot.py	432	432	0%
umap_narrative/801_narrative_report_batch.py	785	785	0%
umap_narrative/802_process_batch_results.py	265	265	0%
umap_narrative/803_check_batch_status.py	175	175	0%
umap_narrative/llm_factory_constructor/init.py	2	2	0%
umap_narrative/llm_factory_constructor/model_provider.py	157	157	0%
umap_narrative/polismath_commentgraph/init.py	1	0	100%
umap_narrative/polismath_commentgraph/cli.py	270	270	0%
umap_narrative/polismath_commentgraph/core/init.py	3	3	0%
umap_narrative/polismath_commentgraph/core/clustering.py	108	108	0%
umap_narrative/polismath_commentgraph/core/embedding.py	104	104	0%
umap_narrative/polismath_commentgraph/lambda_handler.py	219	219	0%
umap_narrative/polismath_commentgraph/schemas/init.py	2	0	100%
umap_narrative/polismath_commentgraph/schemas/dynamo_models.py	160	9	94%
umap_narrative/polismath_commentgraph/tests/conftest.py	17	17	0%
umap_narrative/polismath_commentgraph/tests/test_clustering.py	74	74	0%
umap_narrative/polismath_commentgraph/tests/test_embedding.py	55	55	0%
umap_narrative/polismath_commentgraph/tests/test_storage.py	87	87	0%
umap_narrative/polismath_commentgraph/utils/init.py	3	0	100%
umap_narrative/polismath_commentgraph/utils/converter.py	283	237	16%
umap_narrative/polismath_commentgraph/utils/group_data.py	354	336	5%
umap_narrative/polismath_commentgraph/utils/storage.py	584	477	18%
umap_narrative/reset_conversation.py	159	50	69%
umap_narrative/run_pipeline.py	453	312	31%
utils/general.py	62	41	34%
Total	10919	7310	33%

[Copilot]

Pull request overview

Improves CI behavior for spr-managed stacked PRs by ensuring relevant workflows run on spr/** branches and by reducing redundant E2E workflow runs via GitHub Actions concurrency.

Changes:

• Add .spr.yml configuration for spr stacking/merge behavior.
• Update python-ci and jest-server-test workflows to include spr/** in PR branch filters.
• Add a concurrency group to the Cypress E2E workflow and include spr/** in its PR branch filters.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
.spr.yml	Adds spr configuration for stacked PR workflow/merge requirements.
.github/workflows/python-ci.yml	Runs Delphi Python CI for PRs targeting spr/** branches (stacked PR bases).
.github/workflows/jest-server-test.yml	Runs server integration tests for PRs targeting spr/** branches (stacked PR bases).
.github/workflows/cypress-tests.yml	Adds concurrency to cancel stale E2E runs per ref; enables PRs targeting spr/** branches.

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