Refactor and simplify code in index.rs, scan.rs, and database.rs

- Removed unnecessary references and improved clarity in `Indexer` method calls.
- Reorganized conditionals and eliminated redundant variable assignments in `scan.rs`.
- Simplified database initialization handling by removing unused commented-out code and improving formatting in `database.rs`.

src/commands/index.rs

@@ -53,7 +53,7 @@ pub fn build_index(
     
     let pool = Indexer::init(db_path)?;
     {
-        let idx = Indexer::from_pool(&project_name, &pool).unwrap();
+        let idx = Indexer::from_pool(project_name, &pool).unwrap();
         idx.clear()?;
     }
 
@@ -83,7 +83,7 @@ pub fn build_index(
     }).unwrap();
     
     {
-        let idx = Indexer::from_pool(&project_name, &pool)?;
+        let idx = Indexer::from_pool(project_name, &pool)?;
         idx.vacuum()?;
     }
     

src/commands/scan.rs

@@ -35,10 +35,9 @@ pub fn handle(
 ) -> Result<(), Box<dyn std::error::Error>> {
     let scan_path = Path::new(path).canonicalize()?;
     let (project_name, db_path) = get_project_info(&scan_path, database_dir)?;
-    let diags: Vec<Diag>;
     
-    if no_index {
-        diags = scan_filesystem(&scan_path, config).unwrap();
+    let diags: Vec<Diag> = if no_index {
+        scan_filesystem(&scan_path, config).unwrap()
     } else {
         if rebuild_index || !db_path.exists() {
             tracing::debug!("Scanning filesystem index filesystem");
@@ -46,12 +45,12 @@ pub fn handle(
         }
 
         let pool = Indexer::init(&db_path)?;
-        diags = scan_with_index_parallel(&project_name, pool, config)?;
-    }
+        scan_with_index_parallel(&project_name, pool, config)?
+    };
 
     tracing::debug!("Found {:?} issues.", diags.len());
     
-    if format == "console" || (format == "" && config.output.default_format == "console") {
+    if format == "console" || (format.is_empty() && config.output.default_format == "console") {
         tracing::debug!("Printing to console");
         for d in &diags {
             let sev_str = match d.severity {