feat: support rule-scoped finding ignores by path and line

[wiktor7245]

Summary

• add ignoredFindings config entries scoped by ruleId and path glob
• support optional line for location-specific suppression
• keep other rules active in the same file and expose scoped ignores in JSON/HTML reports

Motivation

ignoredRules is global and exclude skips every rule in a file. This makes it hard to handle known false positives without hiding unrelated findings.

Example:

{
  "ignoredFindings": [
    {
      "ruleId": "SENSITIVE_LOGGING",
      "path": "src/services/**/*.ts"
    },
    {
      "ruleId": "API_KEY_EXPOSED",
      "path": "src/services/DictionariesMapper.ts",
      "line": 32
    }
  ]
}

Validation

• npm run build
• npm run lint
• npm test (67/67 passing)