feat: Note that duckdb RAG driver is unavailable on MUSL Linux builds when initializing a RAG so users know when using the binary, not just based on docs

src/rag/mod.rs

@@ -1869,12 +1869,17 @@ fn select_embedding_model(models: &[&Model]) -> Result<String> {
 }
 
 pub(crate) fn select_rag_driver() -> Result<String> {
-    // Statically linked musl builds cannot dlopen DuckDB extensions, so duckdb is not offered there.
     #[cfg(target_env = "musl")]
-    let options = vec![
-        "yaml   — portable, in-memory HNSW; usable from several Coyote processes at once (default)",
-    ];
+    {
+        println!(
+            "Note: the duckdb RAG driver is only available in GNU builds of coyote \
+             (musl builds are statically linked and cannot load DuckDB extensions). \
+             Using the yaml driver."
+        );
+        Ok("yaml".to_string())
+    }
     #[cfg(not(target_env = "musl"))]
+    {
         let options = vec![
             "yaml   — portable, in-memory HNSW; usable from several Coyote processes at once (default)",
             "duckdb — persistent on-disk store; vectors and content survive restarts; HNSW approximate search.",
@@ -1893,6 +1898,7 @@ pub(crate) fn select_rag_driver() -> Result<String> {
         } else {
             Ok("yaml".to_string())
         }
+    }
 }
 
 const EXTRACTOR_SKIP: &str = "Skip";