Add phrase-based exact match search to search command

[dreamer-coding]

Summary

Enable exact phrase matching in the search command.

Motivation

Users often need to search for exact strings or phrases without partial matches or tokenization.

Proposed Solution

Add support for exact string matching to ensure only precise matches are returned.

Alternatives Considered

Manual quoting or escaping, which is inconsistent and error-prone.

Additional Context

Improves precision for content searches and log analysis