fix: revert entrypoint to migrate deploy, add proper migration file

Create migration 20260426130000_add_agent_schedule_fields with the 3 new
Agent columns (scheduledTime, scheduledDay, timezone). Reverts entrypoint
back to prisma migrate deploy. Removes redundant migration step from
deploy.yaml.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

memento-note/docker-entrypoint.sh

@@ -1,8 +1,8 @@
 #!/bin/sh
 set -e
 
-echo "Syncing database schema..."
-node ./node_modules/prisma/build/index.js db push --skip-generate
+echo "Running Prisma migrations..."
+node ./node_modules/prisma/build/index.js migrate deploy
 
 echo "Starting server..."
 exec node server.js

memento-note/prisma/migrations/20260426130000_add_agent_schedule_fields/migration.sql

@@ -0,0 +1,4 @@
+-- AlterTable: Agent
+ALTER TABLE "Agent" ADD COLUMN "scheduledTime" TEXT DEFAULT '08:00';
+ALTER TABLE "Agent" ADD COLUMN "scheduledDay" INTEGER;
+ALTER TABLE "Agent" ADD COLUMN "timezone" TEXT;