Fix dedup threshold postgres type

src/db.rs

@@ -77,7 +77,7 @@ async fn find_dedup_match<C>(
     client: &C,
     agent_id: &str,
     embedding: &Vector,
-    threshold: f32,
+    threshold: f64,
 ) -> Result<Option<DedupMatch>>
 where
     C: GenericClient + Sync,
@@ -144,6 +144,7 @@ impl Database {
     ) -> Result<StoreMemoryResult> {
         let client = self.pool.get().await?;
         let vector = Vector::from(embedding.to_vec());
+        let dedup_threshold = dedup_threshold as f64;
 
         if let Some(existing) = find_dedup_match(&client, agent_id, &vector, dedup_threshold).await? {
             let merged_metadata = merge_metadata(&existing.metadata, &metadata);
@@ -372,6 +373,7 @@ impl Database {
         let mut client = self.pool.get().await?;
         let transaction = client.transaction().await?;
         let mut results = Vec::with_capacity(entries.len());
+        let dedup_threshold = dedup_threshold as f64;
 
         for (content, metadata, embedding, keywords, expires_at) in entries {
             let vector = Vector::from(embedding);