Implement remaining handlers and fix admin login

- Fix admin login bcrypt hash in database migrations
- Add static data handler (GET /api/static_data/, POST /api/static_data/refresh/)
- Add user handler (list users, get user, list profiles in shared residences)
- Add generate tasks report endpoint for residences
- Remove all placeholder handlers from router
- Add seeding documentation to README

New files:
- internal/handlers/static_data_handler.go
- internal/handlers/user_handler.go
- internal/services/user_service.go
- internal/dto/responses/user.go

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

internal/database/database.go

@@ -342,9 +342,14 @@ func migrateGoAdmin() error {
 	// Seed default admin user (password: admin - bcrypt hash)
 	db.Exec(`
 		INSERT INTO goadmin_users (username, password, name, avatar)
-		VALUES ('admin', '$2a$10$sRv1E1XmGXS5HgU7VK3bNOQRZLGDON0.2xvMlz.bKcIzI3pAF1T3y', 'Administrator', '')
+		VALUES ('admin', '$2a$10$t.GCU24EqIWLSl7F51Hdz.IkkgFK.Qa9/BzEc5Bi2C/I2bXf1nJgm', 'Administrator', '')
 		ON CONFLICT DO NOTHING
 	`)
+	// Update existing admin password if it exists with wrong hash
+	db.Exec(`
+		UPDATE goadmin_users SET password = '$2a$10$t.GCU24EqIWLSl7F51Hdz.IkkgFK.Qa9/BzEc5Bi2C/I2bXf1nJgm'
+		WHERE username = 'admin'
+	`)
 
 	// Seed default roles
 	db.Exec(`INSERT INTO goadmin_roles (name, slug) VALUES ('Administrator', 'administrator') ON CONFLICT DO NOTHING`)