offloaded some apps.lyric.views responsibilities to new Celery depend fn in .tasks; core.celery created for celery config; CELERY_BROKER_URL added to .settings & throughout project; some lyric view IT responsibility now accordingly covered by task UT domain

src/apps/lyric/tasks.py

@@ -0,0 +1,24 @@
+import requests
+
+from celery import shared_task
+from django.conf import settings
+
+
+@shared_task
+def send_login_email_task(email, url):
+    message_body = f"Use this magic link to login to your Dashboard:\n\n{url}"
+    # Send mail via Mailgun HTTP API
+    response = requests.post(
+        f"https://api.mailgun.net/v3/{settings.MAILGUN_DOMAIN}/messages",
+        auth=("api", settings.MAILGUN_API_KEY),
+        data={
+            "from": "adman@howdy.earthmanrpg.com",
+            "to": email,
+            "subject": "A magic login link to your Dashboard",
+            "text": message_body,
+        }
+    )
+
+    # Log any errors
+    if response.status_code != 200:
+        print(f"Mailgun API error: {response.status_code}: {response.text}")