feat: add user_id ticket support and public events endpoint

- Tickets can be created with user_id instead of name/email
- name/email default to empty string in DB (not NULL-safe)
- New endpoints: GET /api/v1/events/public, GET /api/v1/tickets/user/{user_id}
- POST /api/v1/tickets/{event_id} accepts user_id in body
- Migration m007 adds user_id column to tickets table
- CreateTicket validates: either user_id or (name + email) required

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

crud.py

@@ -1,4 +1,5 @@
 from datetime import datetime, timedelta, timezone
+from typing import Optional
 
 from lnbits.db import Database
 from lnbits.helpers import urlsafe_short_hash
@@ -9,7 +10,13 @@ db = Database("ext_events")
 
 
 async def create_ticket(
-    payment_hash: str, wallet: str, event: str, name: str, email: str, extra: dict
+    payment_hash: str,
+    wallet: str,
+    event: str,
+    name: str = "",
+    email: str = "",
+    user_id: Optional[str] = None,
+    extra: Optional[dict] = None,
 ) -> Ticket:
     now = datetime.now(timezone.utc)
     ticket = Ticket(
@@ -18,6 +25,7 @@ async def create_ticket(
         event=event,
         name=name,
         email=email,
+        user_id=user_id,
         registered=False,
         paid=False,
         reg_timestamp=now,
@@ -102,6 +110,23 @@ async def get_events(wallet_ids: str | list[str]) -> list[Event]:
     )
 
 
+async def get_all_events() -> list[Event]:
+    """Get all events without wallet filtering (public endpoint)."""
+    return await db.fetchall(
+        "SELECT * FROM events.events ORDER BY time DESC",
+        model=Event,
+    )
+
+
+async def get_tickets_by_user_id(user_id: str) -> list[Ticket]:
+    """Get all tickets for a specific user by their user_id."""
+    return await db.fetchall(
+        "SELECT * FROM events.ticket WHERE user_id = :user_id ORDER BY time DESC",
+        {"user_id": user_id},
+        model=Ticket,
+    )
+
+
 async def delete_event(event_id: str) -> None:
     await db.execute("DELETE FROM events.events WHERE id = :id", {"id": event_id})