store: wire up redb updates on mutations

Mutations (upsert_node, upsert_provenance, delete_node, rename_node)
now update redb indices atomically with capnp log appends, under the
same StoreLock.

Also removes dead cmd_import command and the parse.rs module it depended on.

Co-Authored-By: Proof of Concept <poc@bcachefs.org>

src/cli/admin.rs

@@ -315,45 +315,6 @@ pub async fn cmd_daily_check() -> Result<()> {
     Ok(())
 }
 
-pub async fn cmd_import(files: &[String]) -> Result<()> {
-    if files.is_empty() {
-        anyhow::bail!("import requires at least one file path");
-    }
-
-    let arc = memory::access_local()?;
-    let mut store = arc.lock().await;
-    let mut count = 0;
-
-    for arg in files {
-        let path = std::path::PathBuf::from(arg);
-        let resolved = if path.exists() {
-            path
-        } else {
-            let mem_path = store::memory_dir().join(arg);
-            if !mem_path.exists() {
-                eprintln!("File not found: {}", arg);
-                continue;
-            }
-            mem_path
-        };
-
-        let filename = resolved.file_name().unwrap().to_string_lossy().to_string();
-        let content = std::fs::read_to_string(&resolved)?;
-        let units = store::parse_units(&filename, &content);
-
-        for unit in units {
-            store.upsert(&unit.key, &unit.content)?;
-            count += 1;
-        }
-    }
-
-    if count > 0 {
-        store.save()?;
-    }
-    println!("Imported {} memory units", count);
-    Ok(())
-}
-
 pub async fn cmd_status() -> Result<()> {
     let result = memory::graph_topology(None).await
         ?;