feat: adds dismiss health event

[tiagoapolo]

Thanks for submitting a PR! Please check the boxes below:

• I have added information to docs/ if required so people know about the feature!
• I have filled in the "Changes" section below?
• I have filled in the "How did you test this code" section below?
• I have used a Conventional Commit title for this Pull Request

Changes

#5844

How did you test this code?

1. Create a Sample provider
2. Add unhealthy event for a feature (see payload example below)
3. Go to feature health tab on feature drawer
4. See dismiss button and info tooltip
5. Click on dismiss and event should be dismissed

Payload:

{
  "environment": "Development",
  "status": "unhealthy",
  "feature": "hehe",
  "reason": {
    "text_blocks": [
      {
        "text": "Payment processing service is experiencing 95% error rate",
        "title": "Service Alert"
      },
      {
        "text": "Average response time has increased from 200ms to 2.5s",
        "title": "Performance Degradation"
      },
      {
        "text": "Database connection pool exhausted, causing timeouts",
        "title": "Root Cause"
      }
    ],
    "url_blocks": [
      {
        "url": "https://grafana.company.com/d/abc123/payment-service?orgId=1&from=now-1h&to=now",
        "title": "Grafana Dashboard"
      },
      {
        "url": "https://datadog.company.com/apm/service/payment-service",
        "title": "Datadog APM"
      },
      {
        "url": "https://runbook.company.com/incidents/payment-service-outage",
        "title": "Incident Runbook"
      },
      {
        "url": "https://slack.company.com/archives/C1234567890",
        "title": "Slack Channel"
      },
      {
        "url": "https://jira.company.com/browse/OPS-1234",
        "title": "Jira Ticket"
      }
    ]
  }
}

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[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-api-test:pr-5863	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-e2e:pr-5863	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api:pr-5863	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-5863	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-5863	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-frontend:pr-5863	Finished ✅	Results ✅

[Zaimwa9]

Looking good 👍

[Zaimwa9]

Re-approved after removing comment