phase3: add normalized domain schema, admin, services, and multistage docker build

apps/competitions/admin.py

@@ -0,0 +1,24 @@
+from django.contrib import admin
+
+from .models import Competition, Season, TeamSeason
+
+
+@admin.register(Competition)
+class CompetitionAdmin(admin.ModelAdmin):
+    list_display = ("name", "competition_type", "gender", "country", "is_active")
+    list_filter = ("competition_type", "gender", "country", "is_active")
+    search_fields = ("name", "slug")
+
+
+@admin.register(Season)
+class SeasonAdmin(admin.ModelAdmin):
+    list_display = ("label", "start_date", "end_date", "is_current")
+    list_filter = ("is_current",)
+    search_fields = ("label",)
+
+
+@admin.register(TeamSeason)
+class TeamSeasonAdmin(admin.ModelAdmin):
+    list_display = ("team", "season", "competition", "standing", "wins", "losses")
+    list_filter = ("season", "competition")
+    search_fields = ("team__name", "competition__name", "season__label")