refactor(db): normalize module prefix snapshot rows

Строки префиксов в module_prefix_snapshot_row вместо JSONB blobs.

Co-authored-by: Cursor <cursoragent@cursor.com>

migrations/sqlite/000019_module_snapshot_rows.up.sql

@@ -0,0 +1,13 @@
+CREATE TABLE module_prefix_snapshot_row (
+    tenant_id     TEXT NOT NULL,
+    module_id     TEXT NOT NULL,
+    ord           INTEGER NOT NULL,
+    prefix        TEXT NOT NULL,
+    community_id  TEXT,
+    source        TEXT NOT NULL DEFAULT '',
+    PRIMARY KEY (tenant_id, module_id, ord),
+    FOREIGN KEY (tenant_id, module_id)
+        REFERENCES module_prefix_snapshot (tenant_id, module_id) ON DELETE CASCADE
+);
+
+ALTER TABLE module_prefix_snapshot DROP COLUMN prefixes_json;