feat(invoices): add billingEntityType/Id for polymorphic billing

src/lib/db/migrations/0006_great_pixie.sql

@@ -0,0 +1,3 @@
+ALTER TABLE "invoices" ADD COLUMN "billing_entity_type" text DEFAULT 'client' NOT NULL;--> statement-breakpoint
+ALTER TABLE "invoices" ADD COLUMN "billing_entity_id" text DEFAULT '' NOT NULL;--> statement-breakpoint
+CREATE INDEX "idx_invoices_billing_entity" ON "invoices" USING btree ("port_id","billing_entity_type","billing_entity_id");

src/lib/db/migrations/meta/_journal.json

@@ -43,6 +43,13 @@
       "when": 1776959832091,
       "tag": "0005_stale_kronos",
       "breakpoints": true
+    },
+    {
+      "idx": 6,
+      "version": "7",
+      "when": 1776959911400,
+      "tag": "0006_great_pixie",
+      "breakpoints": true
     }
   ]
 }