fix: Compatible with special characters in pg full-text search.

[ThreeFish-AI]

Checklist:

Important

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• Please open an issue before creating a PR or link to an existing issue
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Description

In hybrid search, when you do a full-text search with keywords in PG, if there are special characters in the keywords, such as single quotes, an exception will be thrown: syntax error in tsquery: "What's your password policies?"

Fixes #8920

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update, included: Dify Document
• Improvement, including but not limited to code refactoring, performance optimization, and UI/UX improvement
• Dependency upgrade

Testing Instructions

test case: "What's your password policies?"