implement optimistic updates for property mutations

[felixevers]

• Adds audit logging query audit_logs with InfluxDB integration and a new AuditLogType; implements UI timeline (AuditLogTimeline) and GQL GetAuditLogs query
• Introduces pagination helpers (apply_pagination, paginated_query) and adds limit/offset to location_nodes, patients, and tasks queries; updates generated client
• Implements user online status: new users.last_online column/migration, updates on auth/subscriptions, exposes UserType.last_online and is_online; UI shows status (new avatar/status components), GetUsers now returns isOnline
• Enhances subscriptions: base logging, patient_deleted channel, and root-location filtering for patient/task create/update/state/delete; adds Redis subscription utilities and access checks
• Patient model/schema: adds optional description (migrations, inputs, type), included in create/update and queries
• Improves checksum conflict handling (GraphQLError with CONFLICT code) and adds UI dialogs (ConflictResolutionDialog, ErrorDialog)
• Adds task audit events on create/complete; strengthens notification publish logging and error handling; reduces noisy frontend logs and removes some polling in favor of subscriptions
• Misc: GraphQL WS subscription client added; minor auth/session logging tweaks; exports/initializers for new modules

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