Function detect_patterns 

pub fn detect_patterns(
    storage: &dyn StorageBackend,
    namespace: Option<&str>,
    min_frequency: usize,
    total_sessions: usize,
) -> Result<Vec<DetectedPattern>, CodememError>

Detect all patterns in the memory store.

Runs multiple detectors and returns all patterns found, sorted by confidence descending. The min_frequency parameter controls the threshold for how many times a pattern must appear before it is flagged. total_sessions is used for log-scaled confidence computation.