Add project revision foundation

src/db/schema/project-revisions.ts

@@ -0,0 +1,23 @@
+import { integer, sqliteTable, text, unique } from "drizzle-orm/sqlite-core";
+import { projects } from "./projects.js";
+
+export const projectRevisions = sqliteTable(
+  "project_revisions",
+  {
+    id: text("id").primaryKey(),
+    projectId: text("project_id")
+      .notNull()
+      .references(() => projects.id, { onDelete: "cascade" }),
+    revisionNumber: integer("revision_number").notNull(),
+    createdAtIso: text("created_at_iso").notNull(),
+    actorId: text("actor_id"),
+    source: text("source").notNull(),
+    description: text("description"),
+  },
+  (table) => [
+    unique("project_revisions_project_number_unique").on(
+      table.projectId,
+      table.revisionNumber
+    ),
+  ]
+);