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

apps/teams/models.py

@@ -0,0 +1,33 @@
+from django.db import models
+
+
+class Team(models.Model):
+    name = models.CharField(max_length=200)
+    short_name = models.CharField(max_length=80, blank=True)
+    slug = models.SlugField(max_length=220, unique=True)
+    country = models.ForeignKey(
+        "players.Nationality",
+        on_delete=models.SET_NULL,
+        blank=True,
+        null=True,
+        related_name="teams",
+    )
+    founded_year = models.PositiveSmallIntegerField(blank=True, null=True)
+    is_national_team = models.BooleanField(default=False)
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        ordering = ["name"]
+        constraints = [
+            models.UniqueConstraint(fields=["name", "country"], name="uq_team_name_country")
+        ]
+        indexes = [
+            models.Index(fields=["name"]),
+            models.Index(fields=["slug"]),
+            models.Index(fields=["country"]),
+            models.Index(fields=["is_national_team"]),
+        ]
+
+    def __str__(self) -> str:
+        return self.name