cleanup: remove unused compose import, fix comment

- analyze.ts: compose was imported but never called
- notify-format.ts: accurate comment on NotifyChannel export

Author: Ace Autonomous

src/notify-format.ts

@@ -41,7 +41,7 @@ const FORMAT_MAP: Record<string, FormatType> = {
   log:      "plain",
 };
 
-// Legacy compat: re-export channel type for any consumers
+// Channel type — exported for type consumers. Formatting primitives use FormatType internally.
 export type NotifyChannel = "telegram" | "slack" | "discord" | "log" | "plain";
 
 let _format: FormatType | null = null;

src/pattern/analyze.ts

@@ -17,7 +17,7 @@
 import * as fsSync from "fs";
 import * as path from "path";
 import { appendJsonl } from "./store.js";
-import { bold, mono, compose } from "../notify-format.js";
+import { bold, mono } from "../notify-format.js";
 import { notify, flushDigest } from "../notify.js";
 import { generateSkillFromCandidate, writeProposal } from "../skill/generator.js";
 import { validateSkillMd } from "../skill/validator.js";