fix: move user_profiles migration from app-level to core package

packages/core/migrations/032_user_profiles.sql

@@ -0,0 +1,36 @@
+-- User Profiles Table (Core Migration)
+-- Stores extended user profile data separate from auth concerns
+-- Required by admin-users.ts for user edit page profile management
+--
+-- Originally introduced as app-level migration (my-sonicjs-app/migrations/018_user_profiles.sql)
+-- in upstream PR #508. Core routes (admin-users.ts) were updated to query this table in PR #512,
+-- but no corresponding core migration was added. This migration corrects that gap.
+--
+-- IF NOT EXISTS guards ensure idempotency for databases that already have the table
+-- from the app-level migration.
+
+CREATE TABLE IF NOT EXISTS user_profiles (
+  id TEXT PRIMARY KEY,
+  user_id TEXT NOT NULL UNIQUE REFERENCES users(id) ON DELETE CASCADE,
+
+  display_name TEXT,
+  bio TEXT,
+  company TEXT,
+  job_title TEXT,
+  website TEXT,
+  location TEXT,
+  date_of_birth INTEGER,
+
+  created_at INTEGER NOT NULL DEFAULT (strftime('%s', 'now') * 1000),
+  updated_at INTEGER NOT NULL DEFAULT (strftime('%s', 'now') * 1000)
+);
+
+-- Index for fast user lookups
+CREATE INDEX IF NOT EXISTS idx_user_profiles_user_id ON user_profiles(user_id);
+
+-- Trigger to auto-update updated_at timestamp
+CREATE TRIGGER IF NOT EXISTS user_profiles_updated_at
+  AFTER UPDATE ON user_profiles
+BEGIN
+  UPDATE user_profiles SET updated_at = strftime('%s', 'now') * 1000 WHERE id = NEW.id;
+END;