feat: update party model with promoter and time tracking

- Add promoter_id reference to parties table
- Add start_time and end_time datetime fields
- Replace venue fields with single location string
- Update database schema and migration files
- Add port configuration to database.yml
- Update architecture documentation

This commit enhances the party model to support better event tracking and management, including promoter information
and precise timing.

config/database.yml

@@ -16,6 +16,7 @@ default: &default
   username: <%= ENV.fetch("DB_USERNAME") { "root" } %>
   password: <%= ENV.fetch("DB_PASSWORD") { "root" } %>
   host: <%= ENV.fetch("DB_HOST") { "127.0.0.1" } %>
+  port: <%= ENV.fetch("DB_port") { 3306 } %>
 
 development:
   <<: *default