fix: close missing brace in execute_program OMC_VM if-block (omnimcode-cli)

The if std::env::var("OMC_VM") block in execute_program was missing its
closing brace, causing a parse error that prevented the CLI from compiling.

This was a pre-existing breakage introduced when the VM dispatch path
was added; the closing } was never written.

Author: RandomCoder-lab

omnimcode-cli/src/main.rs

@@ -1072,6 +1072,7 @@ fn execute_program(source: &str) -> Result<(), String> {
     }
 
     let mut interpreter = Interpreter::new();
+    interpreter.set_source_code(source.to_string());
     maybe_register_python(&mut interpreter);
     maybe_register_jit(&mut interpreter, &statements);
     // OMC_HEAL_RETRY=1 — catch runtime errors after execution starts,