Handle Float deserialization for ReactionDelaySeconds for leak-detector collector

[nvrzeznik]

The PR changes fetch failures for the leak detector collector from a fixed value to the number of failures that have occured when working through all detectors. In the case of partial failure of some detectors, others will still be read and fetch errors will be surfaced.

Related issues

#5423

Type of Change

• Add - New feature or capability
• Change - Changes in existing functionality
• Fix - Bug fixes
• Remove - Removed features or deprecated functionality
• Internal - Internal changes (refactoring, tests, docs, etc.)

Breaking Changes

• This PR contains breaking changes

Testing

• Unit tests added/updated
• Integration tests added/updated
• Manual testing performed
• No testing required (docs, internal refactor, etc.)

Additional Notes

[coderabbitai]

Summary by CodeRabbit

• Bug Fixes
  • Leak detector collection now continues when an individual detector response cannot be retrieved or decoded.
  • Successfully decoded detectors remain available instead of causing the entire collection to fail.
  • Collection results now report the number of detector failures for improved visibility.
  • Health reports now flag unreadable detectors with sensor-failure alerts.
  • All-clear reports are suppressed when non-leak alerts are present, while valid leak alerts continue to be reported.

Walkthrough

Changes

Leak detector collection now continues after individual fetch or decode failures. It returns readable detectors, unreadable detector IDs, and a failure count. Health reports emit sensor-failure alerts for unreadable detectors. Leak event processing suppresses all-clear reports for incomplete reads while preserving threshold-qualified leak reports.

Leak detector resilience

Layer / File(s)	Summary
Partial detector collection crates/health/src/collectors/leak_detector.rs	Detector fetching collects individual failures and preserves readable detectors. Health reports create sensor-failure alerts for unreadable detector IDs and report the failure count.
Partial collection regression coverage crates/health/src/collectors/leak_detector.rs	HTTP-mocked tests verify that undecodable detector data does not prevent other detectors from being fetched or reported.
Incomplete leak event processing crates/health/src/processor/leak_events.rs	Non-leak alerts prevent all-clear reports. Leak alerts still produce a derived leak report when the threshold is reached. Parameterized tests cover complete and incomplete reads.

Estimated code review effort: 3 (Moderate) | ~25 minutes

Merge Risk: 🟡 Moderate · up to aeefb

Valid leak-detector responses containing values such as 0.0 can currently be reported as sensor failures, so the PR is not merge-ready until deserialization accepts these values and the expected successful-fetch behavior is covered.

Sequence Diagram(s)

sequenceDiagram
  participant HealthCollector
  participant SwitchBMC
  participant LeakEventProcessor
  HealthCollector->>SwitchBMC: fetch detector responses
  SwitchBMC-->>HealthCollector: readable data or fetch/decode failure
  HealthCollector->>LeakEventProcessor: detector alerts and readable detector results
  LeakEventProcessor-->>HealthCollector: all-clear or threshold-qualified leak report

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🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 57.14% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 14 functions across 2 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the float deserialization change for ReactionDelaySeconds in the leak-detector collector. This change is part of the stated objectives and the title is concise and speci…
Description check	✅ Passed	The description directly covers detector fetch failures, partial processing, surfaced errors, related issue #5423, and unit testing. It is relevant to the changeset.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

Full details: Title check

Explanation

The title clearly identifies the float deserialization change for ReactionDelaySeconds in the leak-detector collector. This change is part of the stated objectives and the title is concise and specific.

• Fix all pre-merge checks with AI

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Actionable comments posted: 1

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Inline comments:
In `@crates/health/src/collectors/leak_detector.rs`:
- Around line 649-655: Update LeakDetector deserialization used by
fetch_leak_detectors to accept integral floating-point representations such as
0.0 for the optional ReactionDelaySeconds i64 field, while continuing to reject
non-integral values. Adjust
undecodable_detector_is_named_without_losing_the_batch so all three detector
fixtures fetch successfully and the resulting health report preserves
DetectorState as OK without SensorFailure.

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Reviewing files that changed from the base of the PR and between ed862a8 and aeefb45.

📒 Files selected for processing (2)

• crates/health/src/collectors/leak_detector.rs
• crates/health/src/processor/leak_events.rs

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