style(13-03): apply Prettier formatting across repo

Mechanical reformat — no logic changes. 398 files changed, 19125
insertions(+), 16457 deletions(-). Prettier 3.8.4 with .prettierrc
(singleQuote:true, semi:true, tabWidth:2, trailingComma:all,
printWidth:100). Isolated per D-13-08 for reviewability.

docker-compose.yml

@@ -33,7 +33,7 @@ services:
       mariadb:
         condition: service_healthy
     ports:
-      - "3000:3000"
+      - '3000:3000'
 
   mariadb:
     image: mariadb:11
@@ -45,7 +45,7 @@ services:
     volumes:
       - mariadb_data:/var/lib/mysql
     healthcheck:
-      test: ["CMD", "healthcheck.sh", "--connect", "--innodb_initialized"]
+      test: ['CMD', 'healthcheck.sh', '--connect', '--innodb_initialized']
       interval: 10s
       timeout: 5s
       retries: 5