Upgrade allow adding image in ticket details page comment section

migrations/alembic.ini

@@ -0,0 +1,49 @@
+# A generic, single database configuration.
+# This file is used by Alembic / Flask-Migrate for logging configuration.
+# The actual database URL is injected at runtime by env.py via Flask's
+# current_app — the sqlalchemy.url value here is intentionally a placeholder.
+
+[alembic]
+script_location = migrations
+
+# Placeholder — overridden at runtime by env.py (run_migrations_online).
+sqlalchemy.url = driver://user:pass@localhost/dbname
+
+[loggers]
+keys = root,sqlalchemy,alembic,flask_migrate
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[logger_flask_migrate]
+level = INFO
+handlers =
+qualname = flask_migrate
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S

migrations/env.py

@@ -4,7 +4,10 @@ from alembic import context
 
 config = context.config
 if config.config_file_name is not None:
-    fileConfig(config.config_file_name)
+    try:
+        fileConfig(config.config_file_name)
+    except FileNotFoundError:
+        pass  # alembic.ini absent or CWD mismatch — Flask-Migrate supplies logging elsewhere
 
 target_metadata = current_app.extensions['migrate'].db.metadata
 

migrations/versions/002_add_system_settings.py

@@ -0,0 +1,53 @@
+"""Add system_settings table for application-wide configuration flags.
+
+Revision ID: 002_add_system_settings
+Revises: 001_widen_ticket_history_values
+Create Date: 2026-03-30
+
+Rationale
+---------
+Introduces a generic key-value settings store so that runtime configuration
+flags (such as registration_enabled) can be toggled by administrators through
+the UI without requiring a code deployment or server restart.
+
+Apply
+-----
+    flask db upgrade
+
+Rollback
+--------
+    flask db downgrade
+"""
+
+from alembic import op
+import sqlalchemy as sa
+
+revision = '002_add_system_settings'
+down_revision = '001_widen_ticket_history_values'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.create_table(
+        'system_settings',
+        sa.Column('id',          sa.Integer(),    nullable=False),
+        sa.Column('key',         sa.String(100),  nullable=False),
+        sa.Column('value',       sa.String(500),  nullable=False),
+        sa.Column('description', sa.String(256),  nullable=True),
+        sa.Column('updated_at',  sa.DateTime(),   nullable=True),
+        sa.PrimaryKeyConstraint('id'),
+    )
+    op.create_index('ix_system_settings_key', 'system_settings', ['key'], unique=True)
+
+    # Seed the default: registration is open on fresh installs.
+    op.execute(
+        "INSERT INTO system_settings (key, value, description, updated_at) "
+        "VALUES ('registration_enabled', 'true', "
+        "'Allow new users to self-register via /auth/register', NOW())"
+    )
+
+
+def downgrade():
+    op.drop_index('ix_system_settings_key', table_name='system_settings')
+    op.drop_table('system_settings')