docs: clarify StateWriteConfig is about database (MDBX) writes vs static files (#22299)

Co-authored-by: Amp <amp@ampcode.com>

crates/storage/storage-api/src/state_writer.rs

@@ -127,16 +127,25 @@ pub trait StateWriter {
     ) -> ProviderResult<ExecutionOutcome<Self::Receipt>>;
 }
 
-/// Configuration for what to write when calling [`StateWriter::write_state`].
+/// Configuration for what to write to the database (MDBX) when calling
+/// [`StateWriter::write_state`].
 ///
-/// Used to skip writing certain data types, when they are being written separately.
+/// Some types (receipts, changesets) may be written directly to
+/// static files instead of the database depending on the storage settings. This config allows
+/// skipping those types in the database write to avoid duplication.
 #[derive(Debug, Clone, Copy)]
 pub struct StateWriteConfig {
-    /// Whether to write receipts.
+    /// Whether to write receipts to the database.
+    ///
+    /// Set to `false` when receipts are being written to static files instead.
     pub write_receipts: bool,
-    /// Whether to write account changesets.
+    /// Whether to write account changesets to the database.
+    ///
+    /// Set to `false` when account changesets are being written to static files instead.
     pub write_account_changesets: bool,
-    /// Whether to write storage changesets.
+    /// Whether to write storage changesets to the database.
+    ///
+    /// Set to `false` when storage changesets are being written to static files instead.
     pub write_storage_changesets: bool,
 }