feat: add ScanFailureTopic constant

[kooomix]

Summary

• Add ScanFailureTopic = "scan-failure-v1" constant to pulsar/common/topics.go
• Used by careportsreceiver for scan failure report publishing

Jira: SUB-7074

Test plan

• go build ./... passes

Summary by CodeRabbit

• New Features
  • Added support for scan failure event handling and reporting.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 07ac9d97-979f-4da8-a4f3-2850e917a65a

📥 Commits

Reviewing files that changed from the base of the PR and between f247111 and 5c88789.

📒 Files selected for processing (1)

• pulsar/common/topics.go

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📝 Walkthrough

Walkthrough

A new exported constant ScanFailureTopic with the value "scan-failure-v1" is added to the common package's topics configuration file. This represents a new topic identifier without changes to existing logic.

Changes

Cohort / File(s)	Summary
Topic Constant Addition pulsar/common/topics.go	Introduces new public constant ScanFailureTopic for scan failure event routing.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

A tiny topic hops into place,
ScanFailureTopic joins the race,
With value "scan-failure-v1" so keen,
The simplest change we've ever seen! 🐰✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'feat: add ScanFailureTopic constant' directly and clearly describes the main change—adding a new constant to the codebase.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

• 📝 Generate docstrings (stacked PR)
• 📝 Generate docstrings (commit on current branch)

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feature/scan-failure-topic

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[github-actions]

Summary:

• License scan: failure
• Credentials scan: skipped
• Vulnerabilities scan: skipped
• Unit test: success
• Go linting: success