fix(sqlite): avoid rowid on kv table (#10367)

No migration on this as it has no practical impact, just a slight
cleanup for new installations.

Also a refactor of how we declare single column primary keys, for
consistency.

Signed-off-by: Jakob Borg <jakob@kastelo.net>

internal/db/sqlite/sql/schema/folder/30-indexids.sql

@@ -6,10 +6,9 @@
 
 -- indexids holds the index ID and maximum sequence for a given device and folder
 CREATE TABLE IF NOT EXISTS indexids (
-    device_idx INTEGER NOT NULL,
+    device_idx INTEGER NOT NULL PRIMARY KEY,
     index_id TEXT NOT NULL COLLATE BINARY,
     sequence INTEGER NOT NULL DEFAULT 0,
-    PRIMARY KEY(device_idx),
     FOREIGN KEY(device_idx) REFERENCES devices(idx) ON DELETE CASCADE
 ) STRICT, WITHOUT ROWID
 ;