feat(history): mode-tagged history + top-of-chain journaling (#30)

Record the submission mode per history entry so advanced commands are
reusable in simple mode, and fix the bug where a ':'-one-shot command
lost its ':' across sessions (ADR-0052, closing #30).

Format: the history.log status token gains an optional ':adv' suffix
(ok / ok:adv / err / err:adv); 'source' stays last and canonical, so
replay is unaffected. The in-memory ring (still Vec<String>) stores
advanced entries ': '-prefixed; recall strips the ':' in advanced mode
and keeps it in simple; hydration reconstructs the prefix from the tag.

Journaling moved from the worker to the dispatch layer (spawn_dsl_-
dispatch / run_replay / app-command sites), where the mode is in scope
with no worker plumbing; finalize_persistence writes only yaml/csv
(commit-db-last still atomic for state). The journal write is now
best-effort (command already committed), consistent with the failure
path. App commands journal simple, so they recall bare. Journaling is
now uniform (every successful command, per ADR-0034) — closing a gap
where show tables/relationships/explain didn't journal.

Amends ADR-0034 (status tag + journaling location), ADR-0015 §6
(history.log out of the worker tx), ADR-0040 (journal-write best-effort).
15 worker-level journaling tests retired, re-covered at the new layer
(history.rs format, app.rs recall matrix, iteration6 cross-session
regression, replay). 2471 pass / 0 fail / 0 skip, clippy clean.

tests/it/iteration4a_rebuild_command.rs

@@ -178,10 +178,7 @@ fn rebuild_against_populated_db_wipes_and_reloads() {
     assert_eq!(rows.rows.len(), 1);
     assert_eq!(rows.rows[0][1].as_deref(), Some("Edna"));
 
-    // history.log should contain the rebuild entry.
-    let history = fs::read_to_string(project_path.join("history.log")).unwrap();
-    assert!(
-        history.lines().any(|l| l.ends_with("|ok|rebuild")),
-        "history.log missing rebuild entry:\n{history}",
-    );
+    // ADR-0052: `rebuild` journaling moved to the dispatch layer
+    // (`spawn_rebuild`), so the direct worker call here no longer writes
+    // history.log; this test verifies the wipe/reload behaviour only.
 }