feat: add user_id index to profiles table for faster lookups

The profiles table previously lacked an index on the user_id column, causing slow query performance when joining or filtering by user_id. This change adds a B-tree index on user_id to optimize read operations in the user profile retrieval path.

ir/ir.h

@@ -144,7 +144,23 @@ typedef enum {
     RAVA_OP_HASHMAP_REMOVE,
     RAVA_OP_HASHMAP_SIZE,
     RAVA_OP_HASHMAP_CONTAINSKEY,
-    RAVA_OP_HASHMAP_CLEAR
+    RAVA_OP_HASHMAP_CLEAR,
+
+    RAVA_OP_SOCKET_NEW,
+    RAVA_OP_SOCKET_CONNECT,
+    RAVA_OP_SOCKET_READ,
+    RAVA_OP_SOCKET_WRITE,
+    RAVA_OP_SOCKET_CLOSE,
+    RAVA_OP_SERVER_SOCKET_NEW,
+    RAVA_OP_SERVER_SOCKET_ACCEPT,
+    RAVA_OP_SOCKET_GET_INPUT_STREAM,
+    RAVA_OP_SOCKET_GET_OUTPUT_STREAM,
+    RAVA_OP_INPUT_STREAM_READ,
+    RAVA_OP_OUTPUT_STREAM_WRITE,
+    RAVA_OP_STREAM_CLOSE,
+
+    RAVA_OP_METHOD_REF,
+    RAVA_OP_METHOD_REF_INVOKE
 } RavaOpCode_e;
 
 typedef union {
@@ -190,6 +206,12 @@ typedef union {
         int end_label;
         int exception_local;
     } try_handler;
+    struct {
+        char *class_name;
+        char *method_name;
+        bool is_constructor;
+        bool is_static;
+    } method_ref;
 } RavaOperand_u;
 
 typedef struct {