fix: merge main, address code review feedback for security fix PR #816

- Merge origin/main into branch (resolve conflict in integrations_dashboard.html)
- Add defensive JSON parsing with try/except for integration.config
- Wrap tester() call in try/except to prevent 500 errors from bad config
- Add i18n key integrations.connection_test_failed_fallback in en.json
- Reference i18n key in template JS fallback message
- Update SECURITY_AUDIT.md: add fix date (2026-03-23), update doc date
- Remove accidental revert.sh file
- Fix missing MagicMock/patch imports in test file
- Add tests for invalid JSON config and tester exception error paths

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>
Agent-Logs-Url: https://github.com/christianlouis/DocuElevate/sessions/daebb70e-059a-4601-8864-88eef49f99cf

migrations/versions/038_add_api_token_expires_at.py

@@ -0,0 +1,43 @@
+"""Add expires_at column to api_tokens table.
+
+Allows API tokens to be issued with an optional lifetime.  If ``expires_at``
+is set, the token is automatically rejected after that timestamp.
+
+Revision ID: 038_add_api_token_expires_at
+Revises: 037_add_user_sessions_and_qr_challenges
+Create Date: 2026-03-18
+"""
+
+from typing import Union
+
+import sqlalchemy as sa
+from alembic import op
+
+revision: str = "038_add_api_token_expires_at"
+down_revision: Union[str, None] = "037_add_user_sessions_and_qr_challenges"
+depends_on: Union[str, None] = None
+
+
+def upgrade() -> None:
+    """Add expires_at column to api_tokens (idempotent)."""
+    conn = op.get_bind()
+    inspector = sa.inspect(conn)
+    if "api_tokens" not in inspector.get_table_names():
+        return
+    existing_columns = {col["name"] for col in inspector.get_columns("api_tokens")}
+    if "expires_at" not in existing_columns:
+        op.add_column(
+            "api_tokens",
+            sa.Column("expires_at", sa.DateTime(timezone=True), nullable=True),
+        )
+
+
+def downgrade() -> None:
+    """Remove expires_at column from api_tokens."""
+    conn = op.get_bind()
+    inspector = sa.inspect(conn)
+    if "api_tokens" not in inspector.get_table_names():
+        return
+    existing_columns = {col["name"] for col in inspector.get_columns("api_tokens")}
+    if "expires_at" in existing_columns:
+        op.drop_column("api_tokens", "expires_at")