Refactor sleep and wake time logic with helper functions

tasks/sendSleepMessage.ts

···
   agentContext,
   claimTaskThread,
   releaseTaskThread,
+  isAgentAsleep,
 } from "../utils/agentContext.ts";
 import {
   getNow,
···
 
   const now = getNow();
 
-  if (now.hour >= agentContext.sleepTime) {
+  if (isAgentAsleep(now.hour)) {
     console.log(`🔹 attempting to wind down ${agentContext.agentBskyName}`);
   } else {
     const delay = msUntilDailyWindow(

tasks/sendWakeMessage.ts

···
   agentContext,
   claimTaskThread,
   releaseTaskThread,
+  isAgentAwake,
 } from "../utils/agentContext.ts";
 import { getNow, msFrom, msRandomOffset } from "../utils/time.ts";
 import { messageAgent } from "../utils/messageAgent.ts";
···
 
   const now = getNow();
 
-  if (now.hour >= agentContext.wakeTime && now.hour < agentContext.sleepTime) {
+  if (isAgentAwake(now.hour)) {
     console.log(`🔹 attempting to wake up ${agentContext.agentBskyName}`);
   } else {
     const delay = msUntilDailyWindow(

utils/agentContext.ts

···
 } from "./const.ts";
 import { msFrom } from "./time.ts";
 import { bsky } from "./bsky.ts";
+import {
+  isAgentAsleep as checkIsAsleep,
+  isAgentAwake as checkIsAwake,
+} from "./sleepWakeHelpers.ts";
 
 export const getLettaApiKey = (): string => {
   const value = Deno.env.get("LETTA_API_KEY")?.trim();
···
   agentContext.replyCount = 0;
   agentContext.quoteCount = 0;
 };
+
+export const isAgentAwake = (hour: number): boolean => {
+  return checkIsAwake(hour, agentContext.wakeTime, agentContext.sleepTime);
+};
+
+export const isAgentAsleep = (hour: number): boolean => {
+  return checkIsAsleep(hour, agentContext.wakeTime, agentContext.sleepTime);
+};