Add required pronouns dropdown and fix admin vocal gender selector

- Added a required Pronouns dropdown to /request and /admin/request:
  He/Him/His, She/Her/Hers, They/Them/Their.
- Moved Email to the top of the customer request form; Pronouns sit just below Name.
- Added  column to the requests schema with automatic migration.
- Stored pronouns are included in confirmation emails and Hermes prompt copy.
- Fixed /admin/request so Preferred singer voice / gender is a dropdown
  matching the customer form instead of a free-text input.
- Updated README to describe pronouns and the structured style selectors.

Bumps version to 0.4.7.

models.py

@@ -33,6 +33,7 @@ CREATE TABLE IF NOT EXISTS requests (
     hobbies TEXT,
     notable_facts TEXT,
     style_genre TEXT,
+    pronouns TEXT,
     extra_requests TEXT,
     status TEXT DEFAULT 'pending',
     suno_title TEXT,
@@ -101,7 +102,7 @@ def init_db():
     expected_columns = {
         'requests': [
             'id', 'created_at', 'name', 'email', 'hobbies', 'notable_facts',
-            'style_genre', 'extra_requests', 'status', 'suno_title', 'suno_style',
+            'style_genre', 'pronouns', 'extra_requests', 'status', 'suno_title', 'suno_style',
             'suno_lyrics', 'song_a_path', 'song_b_path', 'vocal_gender',
             'customer_approved', 'approval_notified_at', 'preview_sent_at',
             'delivery_sent_at', 'square_payment_ref', 'admin_alert_email',
@@ -134,7 +135,7 @@ def now_utc():
     return datetime.now(timezone.utc).isoformat()
 
 
-def create_request(name, email, hobbies, notable_facts, style_genre, extra_requests, vocal_gender=None):
+def create_request(name, email, hobbies, notable_facts, style_genre, extra_requests, vocal_gender=None, pronouns=None):
     """
     Insert a new customer request.
     Returns the auto-generated request id.
@@ -142,9 +143,9 @@ def create_request(name, email, hobbies, notable_facts, style_genre, extra_reque
     db = get_db()
     cur = db.execute(
         """INSERT INTO requests
-           (name, email, hobbies, notable_facts, style_genre, extra_requests, vocal_gender, player_token)
-           VALUES (?, ?, ?, ?, ?, ?, ?, ?)""",
-        (name, email, hobbies, notable_facts, style_genre, extra_requests, vocal_gender, new_token())
+           (name, email, hobbies, notable_facts, style_genre, pronouns, extra_requests, vocal_gender, player_token)
+           VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)""",
+        (name, email, hobbies, notable_facts, style_genre, pronouns, extra_requests, vocal_gender, new_token())
     )
     db.commit()
     return cur.lastrowid