fix(deployment): remove conflicting .env file mounts

Remove separate .env file mounts from php, queue-worker, and scheduler
services to fix read-only filesystem mount conflict.

The .env file is already included in the rsync deployment at
/home/deploy/michaelschiemer/current/.env and is accessible through
the main application code mount. Separate file mounts are redundant
and cause Docker mount conflicts because they attempt to create mount
points inside read-only parent directories.

Error fixed:
- error mounting '/var/www/html/.env': read-only file system

Services fixed:
- php: removed .env mount (line 154)
- queue-worker: removed .env mount (line 254)
- scheduler: removed .env mount (line 327)

docker-compose.production.yml

@@ -150,8 +150,6 @@ services:
       - /home/deploy/michaelschiemer/current:/var/www/html:ro
       # Mount storage directory as writable volume (overlays the read-only code mount)
       - storage:/var/www/html/storage:rw
-      # Mount .env file from shared directory (production environment variables)
-      - /home/deploy/michaelschiemer/shared/.env.production:/var/www/html/.env:ro
 
   # Database service removed - using external PostgreSQL Stack (deployment/stacks/postgresql/)
   # Connection via app-internal network using docker-compose.postgres-override.yml
@@ -252,8 +250,6 @@ services:
       - storage:/var/www/html/storage:rw
       # Mount var directory as writable volume for cache and logs (overlays read-only code mount)
       - var-data:/var/www/html/var:rw
-      # Mount .env file from shared directory (production environment variables)
-      - /home/deploy/michaelschiemer/shared/.env.production:/var/www/html/.env:ro
 
     environment:
       - APP_ENV=production
@@ -327,8 +323,6 @@ services:
       - storage:/var/www/html/storage:rw
       # Mount var directory as writable volume for cache and logs (overlays read-only code mount)
       - var-data:/var/www/html/var:rw
-      # Mount .env file from shared directory (production environment variables)
-      - /home/deploy/michaelschiemer/shared/.env.production:/var/www/html/.env:ro
 
     environment:
       - TZ=Europe/Berlin