fix: Qdrant collection name + PipelineProgress accumulation

- scan.rs: rule1 collection 'momentry_public_rule1_v2' → 'momentry_rule1'
- progress.rs: publish_pipeline_progress now reads existing progress and merges stages

src/api/scan.rs

@@ -801,7 +801,11 @@ async fn get_file_stats(
 
     // Text chunk stats (rule1 collection)
     let schema = std::env::var("DATABASE_SCHEMA").unwrap_or_else(|_| "dev".to_string());
-    let rule1_collection = format!("momentry_{}_rule1_v2", schema);
+    let rule1_collection = if schema == "public" {
+        "momentry_rule1".to_string()
+    } else {
+        format!("momentry_{}_rule1_v2", schema)
+    };
     let text_filter = json!({
         "must": [{"key": "file_uuid", "match": {"value": file_uuid}}]
     });