Attribute Macro task_storage 

#[task_storage]

Derives the TaskStorage struct and generates optimized storage structures.

This macro analyzes field annotations and generates:

1. A unified TaskStorage struct
2. LazyField enum for lazy_vec fields
3. Typed accessor methods on TaskStorage
4. TaskStorageAccessors trait with accessor methods
5. TaskFlags bitfield for boolean flags

Field Attributes

All fields require two attributes:

storage = "..." (required)

Specifies how the field is stored:

• direct - Direct field access (e.g., Option<OutputValue>)
• auto_set - Uses AutoSet for small collections
• auto_map - Uses AutoMap for key-value pairs
• counter_map - Uses CounterMap for reference counting
• flag - Boolean flag stored in a compact TaskFlags bitfield (field type must be bool)

category = "..." (required)

Specifies the data category for persistence and access:

• data - Frequently changed, bulk I/O
• meta - Rarely changed, small I/O
• transient - Field is not serialized (in-memory only)

Optional Modifiers

• inline - Field is stored inline on TaskStorage (default is lazy). Only use for hot-path fields that are frequently accessed.
• default - Use Default::default() semantics instead of Option for inline direct fields.
• filter_transient - Filter out transient values during serialization.
• Serialization methods