feat: add moderation module with case tracking database schema

drizzle/0001_heavy_thundra.sql

@@ -0,0 +1,17 @@
+CREATE TABLE "moderation_cases" (
+	"id" bigserial PRIMARY KEY NOT NULL,
+	"case_id" varchar(50) NOT NULL,
+	"type" varchar(20) NOT NULL,
+	"user_id" bigint NOT NULL,
+	"username" varchar(255) NOT NULL,
+	"moderator_id" bigint NOT NULL,
+	"moderator_name" varchar(255) NOT NULL,
+	"reason" text NOT NULL,
+	"metadata" jsonb DEFAULT '{}'::jsonb,
+	"active" boolean DEFAULT true NOT NULL,
+	"created_at" timestamp with time zone DEFAULT now() NOT NULL,
+	"resolved_at" timestamp with time zone,
+	"resolved_by" bigint,
+	"resolved_reason" text,
+	CONSTRAINT "moderation_cases_case_id_unique" UNIQUE("case_id")
+);