feat(players): add origin competition/team model and filtering

apps/players/models.py

@@ -80,6 +80,20 @@ class Player(TimeStampedModel):
         null=True,
         related_name="role_players",
     )
+    origin_competition = models.ForeignKey(
+        "competitions.Competition",
+        on_delete=models.SET_NULL,
+        blank=True,
+        null=True,
+        related_name="origin_players",
+    )
+    origin_team = models.ForeignKey(
+        "teams.Team",
+        on_delete=models.SET_NULL,
+        blank=True,
+        null=True,
+        related_name="origin_players",
+    )
     height_cm = models.PositiveSmallIntegerField(blank=True, null=True)
     weight_kg = models.PositiveSmallIntegerField(blank=True, null=True)
     wingspan_cm = models.PositiveSmallIntegerField(blank=True, null=True)
@@ -105,6 +119,8 @@ class Player(TimeStampedModel):
             models.Index(fields=["nationality"]),
             models.Index(fields=["nominal_position"]),
             models.Index(fields=["inferred_role"]),
+            models.Index(fields=["origin_competition"]),
+            models.Index(fields=["origin_team"]),
             models.Index(fields=["is_active"]),
             models.Index(fields=["height_cm"]),
         ]