feat: send email in share transcript and add email sending in room (#924)

* fix: add source language for file pipeline

* feat: send email in share transcript and add email sending in room

* fix: hide audio and video streaming for unauthenticated users

* fix: security order

server/migrations/versions/b4c7e8f9a012_add_email_transcript_to_to_room.py

@@ -0,0 +1,28 @@
+"""add email_transcript_to to room
+
+Revision ID: b4c7e8f9a012
+Revises: a2b3c4d5e6f7
+Create Date: 2026-03-24 00:00:00.000000
+
+"""
+
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+
+revision: str = "b4c7e8f9a012"
+down_revision: Union[str, None] = "a2b3c4d5e6f7"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "room",
+        sa.Column("email_transcript_to", sa.String(), nullable=True),
+    )
+
+
+def downgrade() -> None:
+    op.drop_column("room", "email_transcript_to")