KI-AGENT: Matrix-Räume persistent verwalten

backend/db/migrations/0038_communication_rooms.sql

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+CREATE TABLE "communication_rooms" (
+    "id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+    "tenant_id" bigint NOT NULL,
+    "key" text NOT NULL,
+    "name" text NOT NULL,
+    "topic" text,
+    "type" text DEFAULT 'room' NOT NULL,
+    "entity_type" text,
+    "entity_id" bigint,
+    "entity_uuid" uuid,
+    "matrix_room_id" text,
+    "matrix_alias" text,
+    "parent_space_room_id" text,
+    "archived" boolean DEFAULT false NOT NULL,
+    "created_at" timestamp with time zone DEFAULT now() NOT NULL,
+    "updated_at" timestamp with time zone,
+    "created_by" uuid,
+    "updated_by" uuid
+);
+
+ALTER TABLE "communication_rooms"
+    ADD CONSTRAINT "communication_rooms_tenant_id_tenants_id_fk"
+    FOREIGN KEY ("tenant_id") REFERENCES "public"."tenants"("id")
+    ON DELETE cascade ON UPDATE no action;
+
+ALTER TABLE "communication_rooms"
+    ADD CONSTRAINT "communication_rooms_created_by_auth_users_id_fk"
+    FOREIGN KEY ("created_by") REFERENCES "public"."auth_users"("id")
+    ON DELETE no action ON UPDATE no action;
+
+ALTER TABLE "communication_rooms"
+    ADD CONSTRAINT "communication_rooms_updated_by_auth_users_id_fk"
+    FOREIGN KEY ("updated_by") REFERENCES "public"."auth_users"("id")
+    ON DELETE no action ON UPDATE no action;
+
+CREATE UNIQUE INDEX "communication_rooms_tenant_key_idx"
+    ON "communication_rooms" USING btree ("tenant_id", "key");
+
+CREATE INDEX "communication_rooms_tenant_idx"
+    ON "communication_rooms" USING btree ("tenant_id");
+
+CREATE INDEX "communication_rooms_entity_idx"
+    ON "communication_rooms" USING btree ("tenant_id", "entity_type", "entity_id", "entity_uuid");