Prevent path traversal in interaction storage and make Clear All deletion async

[cuongmx]

Motivation

• Prevent attackers from causing path traversal by supplying crafted unique-id values that are used directly in persistence filenames.
• Avoid synchronous file I/O on the Swing Event Dispatch Thread during the "Clear All" action to prevent transient UI freezes.

Description

• Added burp.util.StorageFileUtils which centralizes identifier sanitization (sanitizeIdentifierForFilename) and builds safe storage paths via interactionsFile(File, String).
• Replaced ad-hoc filename construction with StorageFileUtils.interactionsFile(...) in PollingService, BinTab, and BinService to eliminate path traversal risk when creating/reading/writing interactions-{id}.json.
• Refactored BinTab Clear All flow to perform persistence-file deletion on a background daemon thread (deletePersistenceFileAsync) and report results back onto the EDT with SwingUtilities.invokeLater, while deletePersistenceFile now returns a boolean indicating success.

Testing

• Attempted an automated build with mvn -q -DskipTests compile, which failed due to external dependency resolution (Maven Central returned HTTP 403 for maven-resources-plugin), so the code changes were not validated by a successful full build in this environment.

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Codex Task