Hasilkan diagram arsitektur

Analyze the data models in @booking_system_backend/models.py and the 
Java domain classes in @booking_system_inventory_hold_service/src/main/java/com/galaxium/holdservice/domain.

Generate a Mermaid classDiagram that shows all classes, their attributes,
their methods (if any), and the relationships between them. 
Include the BookingStatus enum.

Output the Mermaid markup. Do not render the Mermaid diagram.

Analyze the booking flow across @booking_system_frontend/src/services,
@booking_system_backend/server.py, @booking_system_backend/services/booking.py,
and @booking_system_inventory_hold_service/src/main/java/com/galaxium/holdservice/api.

Generate a Mermaid sequenceDiagram showing the complete flow for a
user booking a flight, including the quote and hold steps with the Java service.

Output the Mermaid markup. Do not render the Mermaid diagram.

Analyze the full Galaxium Travels application. 

Identify all actors (user types or external systems) and the use cases each
actor can perform, based on the frontend pages, backend REST endpoints,
and MCP tools.

Generate a Mermaid flowchart LR that represents this as a use case diagram,
grouping use cases under their respective actors using subgraphs.

Escape curly braces in Mermaid markup so that the Mermaid renderer does not
attempt to interpret the curly braces as template syntax.

Output the Mermaid markup. Do not render the Mermaid diagram.

Create a docs/architecture/ folder in the repository root.

Save each of the three diagrams we generated as individual Markdown files:
- class-diagram.md
- sequence-diagram.md
- use-case-diagram.md

Each file should have a short title heading, the Mermaid code block we
generated, and a brief description of the diagram.