fix(test): update corpus_revision baseline to post-V009 migration

V009 migration bumps corpus_revision by 1 at apply time (spec §5.2 —
invalidates pre-V009 LRU search cache). Existing tests assumed V004
seed (0) was the final baseline; updated to expect 1 after migration:

- fresh_store_starts_at_zero → fresh_store_starts_at_post_migration_baseline
- bump_increments_monotonically: expected 1,2,3 → 2,3,4 (post-baseline)
- revision_persists_across_reopen: 2 → 3 (V009 +1, +bump,+bump)

Spec: docs/superpowers/specs/2026-05-28-v0.20.x-korean-morphological-tokenizer-spec.md §5.2
Plan: docs/superpowers/plans/2026-05-28-v0.20.x-korean-morphological-tokenizer-plan.md (S3 follow-up)

crates/kebab-store-sqlite/tests/corpus_revision.rs

@@ -20,23 +20,26 @@ fn open_store(tmp: &TempDir) -> SqliteStore {
     store
 }
 
-/// Fresh store seeds `corpus_revision = 0` (per V004 INSERT).
+/// Fresh store baseline: V004 seeds `corpus_revision = 0`, then V009
+/// migration bumps it by one to invalidate any pre-V009 LRU cache —
+/// so a fresh store after `run_migrations()` reads back as `1`.
 #[test]
-fn fresh_store_starts_at_zero() {
+fn fresh_store_starts_at_post_migration_baseline() {
     let tmp = TempDir::new().unwrap();
     let store = open_store(&tmp);
-    assert_eq!(store.corpus_revision(), 0);
+    assert_eq!(store.corpus_revision(), 1);
 }
 
-/// Each `bump_corpus_revision` returns the new value monotonically.
+/// Each `bump_corpus_revision` returns the new value monotonically
+/// from the post-migration baseline.
 #[test]
 fn bump_increments_monotonically() {
     let tmp = TempDir::new().unwrap();
     let store = open_store(&tmp);
-    assert_eq!(store.bump_corpus_revision().unwrap(), 1);
     assert_eq!(store.bump_corpus_revision().unwrap(), 2);
     assert_eq!(store.bump_corpus_revision().unwrap(), 3);
-    assert_eq!(store.corpus_revision(), 3);
+    assert_eq!(store.bump_corpus_revision().unwrap(), 4);
+    assert_eq!(store.corpus_revision(), 4);
 }
 
 /// `corpus_revision` survives a store re-open (persisted in SQLite).
@@ -49,6 +52,6 @@ fn revision_persists_across_reopen() {
         store.bump_corpus_revision().unwrap();
     } // store dropped — file closed
     let store = open_store(&tmp);
-    assert_eq!(store.corpus_revision(), 2);
-    assert_eq!(store.bump_corpus_revision().unwrap(), 3);
+    assert_eq!(store.corpus_revision(), 3);
+    assert_eq!(store.bump_corpus_revision().unwrap(), 4);
 }