refactor(cycle,medications): break the gate and compliance import cycles

The module gate and the cycle gate imported each other for one pure
predicate. isCycleEnabled moves to lib/cycle/enabled.ts and both gates
import it from there.

The band minter read DOSE_WINDOW_DEFAULTS through the analytics/compliance
re-export barrel, which loads the compliance display and with it the
scheduling modules that import the minter. It now imports the constant from
the module that defines it. Runtime import cycles fall from 6 to 4.

src/lib/modules/gate.ts

@@ -46,7 +46,7 @@
  */
 import { apiError } from "@/lib/api-response";
 import { prisma } from "@/lib/db";
-import { isCycleEnabled } from "@/lib/cycle/gate";
+import { isCycleEnabled } from "@/lib/cycle/enabled";
 import { getAssistantFlags } from "@/lib/feature-flags";
 import { memoizePerRequest } from "@/lib/request-cache";
 import {