feat(contacts): store contact submissions

apps/contacts/models.py

@@ -0,0 +1,36 @@
+from django.db import models
+
+from core.models.base import BaseModel
+
+
+class ContactSubmission(BaseModel):
+    class Status(models.TextChoices):
+        NEW = "new", "New"
+        CONTACTED = "contacted", "Contacted"
+        CLOSED = "closed", "Closed"
+        SPAM = "spam", "Spam"
+
+    first_name = models.CharField(max_length=120)
+    last_name = models.CharField(max_length=120)
+    email = models.EmailField()
+    mobile = models.CharField(max_length=32)
+    message = models.TextField()
+    status = models.CharField(
+        max_length=20,
+        choices=Status.choices,
+        default=Status.NEW,
+    )
+    ip_address = models.GenericIPAddressField(null=True, blank=True)
+    user_agent = models.TextField(blank=True)
+
+    class Meta:
+        db_table = "contact_submission"
+        ordering = ("-created_at",)
+        indexes = (
+            models.Index(fields=("created_at",), name="contact_created_at_idx"),
+            models.Index(fields=("status",), name="contact_status_idx"),
+            models.Index(fields=("email",), name="contact_email_idx"),
+        )
+
+    def __str__(self):
+        return f"{self.first_name} {self.last_name} - {self.email}"