// Package roles provides role-based access control and context filtering for the SLURP system.
//
// This package implements comprehensive role-based access control (RBAC) for contextual
// intelligence, ensuring that context information is appropriately filtered, encrypted,
// and distributed based on role permissions and security requirements. It integrates
// with the existing BZZZ crypto system to provide secure, scalable access control.
//
// Key Features:
//   - Hierarchical role definition and management
//   - Context filtering based on role permissions and access levels
//   - Integration with BZZZ crypto system for role-based encryption
//   - Dynamic permission evaluation and caching for performance
//   - Role-specific context views and perspectives
//   - Audit logging for access control decisions
//   - Permission inheritance and delegation
//   - Temporal access control with time-based permissions
//
// Core Components:
//   - RoleManager: Definition and management of roles and permissions
//   - AccessController: Access control decision making and enforcement
//   - ContextFilter: Role-based filtering of context information
//   - PermissionEvaluator: Dynamic evaluation of permissions
//   - AuditLogger: Logging of access control events
//   - EncryptionManager: Role-based encryption and key management
//
// Integration Points:
//   - pkg/crypto: Role-based encryption and key management
//   - pkg/slurp/context: Context filtering and access control
//   - pkg/slurp/storage: Encrypted storage with role-based access
//   - pkg/election: Leader-based role administration
//   - pkg/config: Role configuration and policies
//
// Example Usage:
//
//	roleManager := roles.NewRoleManager(storage, crypto)
//	ctx := context.Background()
//	
//	// Define a new role
//	role := &Role{
//	    Name: "Senior Developer",
//	    Permissions: []Permission{
//	        PermissionReadCode,
//	        PermissionWriteCode,
//	        PermissionViewArchitecture,
//	    },
//	    AccessLevel: AccessLevelHigh,
//	}
//	err := roleManager.CreateRole(ctx, role)
//	
//	// Assign role to user
//	err = roleManager.AssignRole(ctx, "user123", "senior-developer")
//	
//	// Filter context based on role
//	filter := roles.NewContextFilter(roleManager)
//	filteredContext, err := filter.FilterContext(ctx, originalContext, "senior-developer")
//	
//	// Check permissions
//	controller := roles.NewAccessController(roleManager)
//	canAccess, err := controller.CheckPermission(ctx, "user123", PermissionViewArchitecture)
//	if canAccess {
//	    // Allow access to architectural context
//	}
//
// Role Hierarchy:
// The system supports hierarchical roles where higher-level roles inherit
// permissions from lower-level roles. This enables flexible permission
// management while maintaining security boundaries appropriate for different
// team responsibilities and access needs.
//
// Access Levels:
// Context information is classified into different access levels (Public,
// Low, Medium, High, Critical) and roles are granted appropriate access
// levels. This ensures sensitive information is only available to
// authorized personnel while enabling collaboration on appropriate content.
//
// Temporal Access Control:
// The system supports time-based access control where permissions can be
// granted for specific time periods, enabling temporary access for
// contractors, time-limited elevated permissions, and automatic access
// revocation for compliance and security requirements.
//
// Performance Considerations:
// - Permission caching with configurable TTL for fast access decisions
// - Batch permission evaluation for efficiency with large contexts
// - Pre-computed role hierarchies and permission inheritance
// - Optimized context filtering algorithms for minimal overhead
// - Background permission synchronization across cluster nodes
//
// Security Model:
// All access control decisions are based on cryptographically verified
// role assignments and permissions. The system integrates with the BZZZ
// crypto infrastructure to ensure secure key distribution and context
// encryption, preventing unauthorized access even in case of node
// compromise or network interception.
//
// Audit and Compliance:
// Comprehensive audit logging tracks all access control decisions,
// permission changes, and context access patterns. This supports
// compliance requirements, security analysis, and debugging of
// access control issues while maintaining performance through
// asynchronous logging and efficient storage.
package roles