Use bind mounts for pgdata and dp_keys in docker-compose

Matches the production compose so the stack data lives next to the
compose file and can be backed up with the server. ticket_uploads stays
a named volume to avoid losing existing attachments on pull.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.gitignore

@@ -415,6 +415,10 @@ FodyWeavers.xsd
 *.sln.iml
 
 
+# Данные docker-compose (bind-маунты) — БД и key-ring Data Protection
+/pgdata/
+/dp_keys/
+
 # Local environment files (secrets) — keep .env.example, ignore real .env
 .env
 .env.local