[#1033] Allow loading fixture pg in csb dev login

[marlonbaeten]

Closes #1033

DOD checklist

For PR maintainer

Perform these checks before marking the PR as ready:

• I have linked the PR to at least one issue.
• I assigned the PR to myself.
• I have added a description how to test this PR (see "Review Instructions").
• I have added documentation where necessary.

For reviewer

• I have read all code changes.
• I have audited the code quality.
• I have tested the changes either or both:
  • locally
  • on the test environment (preferred)
• I have validated that the PR is functionally correct (use-cases, figma designs, etc.)

Review instructions

See the new playwright test - that should succeed.

[github-actions]

Sigrid maintainability feedback

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⏸️️ You are still below your objective of 3.5 stars.

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Sigrid compared your code against the baseline of 2026-07-31.

👍 What went well?

You fixed or improved 2 refactoring candidates.

Risk	System property	Location
🟡	Unit Size (Fixed)	src/middleware/dev_login.rs ensure_dev_store(AppState,StreamId,bool,ElectionConfig)
🟡	Unit Interfacing (Fixed)	src/middleware/dev_login.rs ensure_dev_store(AppState,StreamId,bool,ElectionConfig)

👎 What could be better?

Unfortunately, 4 refactoring candidates were introduced or got worse.

Risk	System property	Location
🔴	Unit Size (Introduced)	src/middleware/dev_login.rs perform_dev_login(AppState,CookieJar,DevLoginQuery,axum http HeaderMap,Scope)
🟠	Unit Interfacing (Introduced)	src/middleware/dev_login.rs perform_dev_login(AppState,CookieJar,DevLoginQuery,axum http HeaderMap,Scope)
🟠	Unit Interfacing (Introduced)	src/middleware/dev_login.rs ensure_dev_store(AppState,StreamId,bool,Option<DisplayName>,ElectionConfig)
🟡	Unit Size (Introduced)	src/middleware/dev_login.rs ensure_dev_store(AppState,StreamId,bool,Option<DisplayName>,ElectionConfig)

📚 Remaining technical debt

0 refactoring candidates didn't get better or worse, but are still present in the code you touched.

View this system in Sigrid to explore your technical debt

⭐️ Sigrid ratings

System property	System on 2026-07-31	Before changes	New/changed code
Volume	N/A	N/A	N/A
Duplication	5.3	5.5	5.5
Unit Size	3.1	0.5	0.5
Unit Complexity	4.5	5.5	5.5
Unit Interfacing	2.4	0.5	0.5
Module Coupling	3.1	N/A	N/A
Component Independence	1.9	5.5	5.5
Component Entanglement	1.6	N/A	N/A
Maintainability	3.1	2.6	2.6

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[github-actions]

PDF diff summary

Template	Input	Status
model-h1	model-h1-example-1.pdf	🔵 identical
model-h1	model-h1-example-2.pdf	🔵 identical
model-h1	model-h1-example-3.pdf	🔵 identical
model-h3-1	model-h3-1-example-1.pdf	🔵 identical
model-h3-1	model-h3-1-example-2.pdf	🔵 identical
model-h3-1	model-h3-1-example-3.pdf	🔵 identical
model-h3-2	model-h3-2-example-1.pdf	🔵 identical
model-h3-2	model-h3-2-example-2.pdf	🔵 identical
model-h3-2	model-h3-2-example-3.pdf	🔵 identical
model-h4	model-h4-example-1.pdf	🔵 identical
model-h4	model-h4-example-2.pdf	🔵 identical
model-h4	model-h4-example-3.pdf	🔵 identical
model-h9	model-h9-example-1.pdf	🔵 identical
model-h9	model-h9-example-2.pdf	🔵 identical
model-h9	model-h9-example-3.pdf	🔵 identical
model-i4	model-i4-example-1.pdf	🔵 identical
model-i4	model-i4-example-2.pdf	🔵 identical

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud