cli: add memory_history, remove dump-json/edges/lookups

- Add memory_history MCP tool for version history
- Convert cmd_history to use memory_rpc
- Add raw parameter to memory_render for editing
- Remove unused: dump-json, list-edges, lookup-bump, lookups
- Fix render_node path in defs.rs/subconscious.rs

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

src/main.rs

@@ -209,11 +209,6 @@ enum NodeCmd {
         /// Glob pattern to filter keys
         pattern: Option<String>,
     },
-    /// List all edges (tsv: source target strength type)
-    Edges,
-    /// Dump entire store as JSON
-    #[command(name = "dump")]
-    Dump,
 }
 
 #[derive(Subcommand)]
@@ -421,17 +416,6 @@ enum AdminCmd {
     Log,
     /// Show current parameters
     Params,
-    /// Bump daily lookup counter for keys
-    #[command(name = "lookup-bump")]
-    LookupBump {
-        /// Node keys
-        keys: Vec<String>,
-    },
-    /// Show daily lookup counts
-    Lookups {
-        /// Date (default: today)
-        date: Option<String>,
-    },
     /// Migrate transcript stub nodes to progress log
     #[command(name = "migrate-transcript-progress")]
     MigrateTranscriptProgress,
@@ -511,8 +495,6 @@ impl Run for NodeCmd {
             Self::Delete { key }            => cli::node::cmd_node_delete(&key),
             Self::Rename { old_key, new_key } => cli::node::cmd_node_rename(&old_key, &new_key),
             Self::List { pattern }          => cli::node::cmd_list_keys(pattern.as_deref()),
-            Self::Edges                     => cli::node::cmd_list_edges(),
-            Self::Dump                      => cli::node::cmd_dump_json(),
         }
     }
 }
@@ -572,8 +554,6 @@ impl Run for AdminCmd {
             Self::LoadContext { stats } => cli::misc::cmd_load_context(stats),
             Self::Log           => cli::misc::cmd_log(),
             Self::Params        => cli::misc::cmd_params(),
-            Self::LookupBump { keys } => cli::node::cmd_lookup_bump(&keys),
-            Self::Lookups { date } => cli::node::cmd_lookups(date.as_deref()),
             Self::MigrateTranscriptProgress => {
                 let mut store = store::Store::load()?;
                 let count = store.migrate_transcript_progress()?;