abiteman 9c2b607788 fix: resolve integration code review issues
- Fix invalid use of 'this' in static context in paperless.js and papra.js statusCheck methods
- Fix error handling in papra.js testConnection to properly rethrow errors instead of returning undefined
- Fix memory leak in externalDocManager.js by storing event handler references for proper removal

Resolves code review feedback from PR #112 discussion
2025-07-16 22:18:15 -05:00
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