bugfix: parse password on db connection string when it has @ on It

[Cristhianzl]

#3070

📝 (pgvector.py): add support for parsing and transforming connection string in PGVectorStoreComponent to improve security and maintainability 📝 (connection_string_parser.py): create utility function to transform connection string by encoding password to improve security 📝 (test_connection_string_parser.py): add unit tests for transform_connection_string function to ensure correct transformation of connection string

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_{Last Modified at 02 Aug 24 17:08 UTC}

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