Remove .md suffix stripping from key lookups

The strip_md_suffix function was removed but its usages remained,
causing lookups like `identity.md` to fail (stripped to `identity`
which didn't exist). Now keys are used as-is.

Renamed 4 nodes that had .md suffixes to canonical form:
- identity.md → identity
- promotion-work-queue.md-* → promotion-work-queue-*
- patterns.md#* → patterns-*
- practices.md#* → practices-*

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

src/cli/node.rs

@@ -5,7 +5,6 @@
 
 use anyhow::{bail, Context, Result};
 use crate::hippocampus as memory;
-use crate::store;
 
 pub async fn cmd_weight_set(key: &str, weight: f32) -> Result<()> {
     super::check_dry_run();
@@ -48,9 +47,8 @@ pub async fn cmd_render(key: &[String]) -> Result<()> {
         bail!("render requires a key");
     }
     let key = key.join(" ");
-    let bare = store::strip_md_suffix(&key);
 
-    let rendered = memory::memory_render(None, &bare, None).await?;
+    let rendered = memory::memory_render(None, &key, None).await?;
     print!("{}", rendered);
 
     // Mark as seen if we're inside a Claude session (not an agent subprocess —
@@ -67,7 +65,7 @@ pub async fn cmd_render(key: &[String]) -> Result<()> {
         {
             use std::io::Write;
             let ts = chrono::Local::now().format("%Y-%m-%dT%H:%M:%S");
-            let _ = writeln!(f, "{}\t{}", ts, bare);
+            let _ = writeln!(f, "{}\t{}", ts, key);
         }
     }