Do repo hard deletes in favor of simplicity

Author: myftija

internal-packages/database/prisma/migrations/20250829124138_add_gh_installation_schema/migration.sql

@@ -26,7 +26,6 @@ CREATE TABLE "public"."GithubRepository" (
     "htmlUrl" TEXT NOT NULL,
     "private" BOOLEAN NOT NULL,
     "defaultBranch" TEXT NOT NULL,
-    "removedAt" TIMESTAMP(3),
     "installationId" TEXT NOT NULL,
     "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
     "updatedAt" TIMESTAMP(3) NOT NULL,

internal-packages/database/prisma/schema.prisma

@@ -2278,8 +2278,6 @@ model GithubRepository {
   private       Boolean
   defaultBranch String
 
-  removedAt DateTime?
-
   installation   GithubAppInstallation @relation(fields: [installationId], references: [id], onDelete: Cascade, onUpdate: Cascade)
   installationId String