fix(db): use BLOB for embedding column, graceful vector index degradation

- schema.sql: F32_BLOB(384) → BLOB (F32_BLOB requires libSQL server extensions)
- pool.rs: try-create vector index separately with graceful fallback
- Fixes "no such column: embedding" error on DB creation in embedded/core mode
- Update TOML test expectations

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: z23cc

flowctl/crates/flowctl-db/src/pool.rs

@@ -89,6 +89,16 @@ async fn apply_schema(conn: &Connection) -> Result<(), DbError> {
     conn.execute_batch(SCHEMA_SQL)
         .await
         .map_err(|e| DbError::Schema(format!("schema apply failed: {e}")))?;
+
+    // Try to create the vector index (requires libSQL server extensions).
+    // Gracefully degrade if not available (embedded/core mode).
+    let _ = conn
+        .execute(
+            "CREATE INDEX IF NOT EXISTS memory_emb_idx ON memory(libsql_vector_idx(embedding))",
+            (),
+        )
+        .await;
+
     Ok(())
 }
 

flowctl/crates/flowctl-db/src/schema.sql

@@ -192,7 +192,7 @@ CREATE TABLE IF NOT EXISTS memory (
     created_at    TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now')),
     last_verified TEXT,
     refs          INTEGER NOT NULL DEFAULT 0,
-    embedding     F32_BLOB(384)
+    embedding     BLOB
 );
 
 -- ── Indexes ─────────────────────────────────────────────────────────
@@ -211,7 +211,9 @@ CREATE INDEX IF NOT EXISTS idx_memory_track ON memory(track);
 CREATE INDEX IF NOT EXISTS idx_memory_severity ON memory(severity);
 
 -- Native libSQL vector index for semantic memory search
-CREATE INDEX IF NOT EXISTS memory_emb_idx ON memory(libsql_vector_idx(embedding));
+-- NOTE: libsql_vector_idx requires libSQL server extensions (not available in core/embedded mode).
+-- Applied separately in pool.rs with graceful degradation.
+-- CREATE INDEX IF NOT EXISTS memory_emb_idx ON memory(libsql_vector_idx(embedding));
 
 -- ── Auto-aggregation trigger ────────────────────────────────────────
 

flowctl/tests/cmd/next_json.toml

@@ -1,4 +1,5 @@
 bin.name = "flowctl"
 args = ["--json", "next"]
-status.code = 1
-stdout = ""
+stdout = """
+{"epic":null,"reason":"none","status":"none","task":null}
+"""

flowctl/tests/cmd/validate_json.toml

@@ -1,4 +1,3 @@
 bin.name = "flowctl"
 args = ["--json", "validate", "--all"]
-status.code = 1
 stdout = "..."