journal: remove all stringly-typed key patterns, use NodeType

- journal_new: key is slugified title (agent names things properly)
- journal_tail: sort by created_at (immutable), not timestamp (mutable)
- journal_update: find latest by created_at
- {{latest_journal}}: query by NodeType::EpisodicSession, not "journal" key
- poc-memory journal write: requires a name argument
- Removed all journal#j-{timestamp}-{slug} patterns from:
  - prompts.rs (rename candidates)
  - graph.rs (date extraction, organize skip list)
  - cursor.rs (date extraction)
  - store/mod.rs (doc comment)
- graph.rs organize: filter by NodeType::Semantic instead of key prefix
- cursor.rs: use created_at for date extraction instead of key parsing

Co-Authored-By: Kent Overstreet <kent.overstreet@linux.dev>

src/main.rs

@@ -93,6 +93,9 @@ enum Command {
         /// Filter by provenance (substring match, e.g. "surface-observe")
         #[arg(long, short)]
         provenance: Option<String>,
+        /// Show all versions (default: dedup to latest per key)
+        #[arg(long)]
+        all_versions: bool,
     },
     /// Summary of memory state
     Status,
@@ -271,6 +274,8 @@ enum CursorCmd {
 enum JournalCmd {
     /// Write a journal entry to the store
     Write {
+        /// Entry name (becomes the node key)
+        name: String,
         /// Entry text
         text: Vec<String>,
     },
@@ -785,8 +790,8 @@ impl Run for Command {
             Self::Write { key }         => cli::node::cmd_write(&key),
             Self::Edit { key }          => cli::node::cmd_edit(&key),
             Self::History { full, key }  => cli::node::cmd_history(&key, full),
-            Self::Tail { n, full, provenance }
-                => cli::journal::cmd_tail(n, full, provenance.as_deref()),
+            Self::Tail { n, full, provenance, all_versions }
+                => cli::journal::cmd_tail(n, full, provenance.as_deref(), !all_versions),
             Self::Status                 => cli::misc::cmd_status(),
             Self::Query { expr }         => cli::misc::cmd_query(&expr),
             Self::Used { key }           => cli::node::cmd_used(&key),
@@ -820,7 +825,7 @@ impl Run for NodeCmd {
 impl Run for JournalCmd {
     fn run(self) -> Result<(), String> {
         match self {
-            Self::Write { text }                         => cli::journal::cmd_journal_write(&text),
+            Self::Write { name, text }                    => cli::journal::cmd_journal_write(&name, &text),
             Self::Tail { n, full, level }                => cli::journal::cmd_journal_tail(n, full, level),
             Self::Enrich { jsonl_path, entry_text, grep_line }
                 => cli::agent::cmd_journal_enrich(&jsonl_path, &entry_text, grep_line),