Cleanup unused message embedding code

Fixup some warnings

src/database/calendar_dao.rs

@@ -26,6 +26,7 @@ pub struct CalendarEvent {
 
 /// Data for inserting a new calendar event
 #[derive(Clone, Debug)]
+#[allow(dead_code)]
 pub struct InsertCalendarEvent {
     pub event_uid: Option<String>,
     pub summary: String,
@@ -219,12 +220,13 @@ impl CalendarEventDao for SqliteCalendarEventDao {
 
             // Validate embedding dimensions if provided
             if let Some(ref emb) = event.embedding
-                && emb.len() != 768 {
-                    return Err(anyhow::anyhow!(
-                        "Invalid embedding dimensions: {} (expected 768)",
-                        emb.len()
-                    ));
-                }
+                && emb.len() != 768
+            {
+                return Err(anyhow::anyhow!(
+                    "Invalid embedding dimensions: {} (expected 768)",
+                    emb.len()
+                ));
+            }
 
             let embedding_bytes = event.embedding.as_ref().map(|e| Self::serialize_vector(e));
 
@@ -289,13 +291,14 @@ impl CalendarEventDao for SqliteCalendarEventDao {
                 for event in events {
                     // Validate embedding if provided
                     if let Some(ref emb) = event.embedding
-                        && emb.len() != 768 {
-                            log::warn!(
-                                "Skipping event with invalid embedding dimensions: {}",
-                                emb.len()
-                            );
-                            continue;
-                        }
+                        && emb.len() != 768
+                    {
+                        log::warn!(
+                            "Skipping event with invalid embedding dimensions: {}",
+                            emb.len()
+                        );
+                        continue;
+                    }
 
                     let embedding_bytes =
                         event.embedding.as_ref().map(|e| Self::serialize_vector(e));