feat(ast): add missing type definitions for Rust analysis

Add RustGenericParam, RustLifetimeParam, RustParameter, RustCallSite, and
RustVariableDeclaration classes to complete the type hierarchy. These model
generic types, lifetimes, parameters, call sites and variable declarations
for comprehensive Rust code analysis.

Author: rithulkamesh

cldk/models/rust/models.py

@@ -34,16 +34,6 @@ class UnsafeReason(Enum):
     CUSTOM = "custom"
 
 
-class UnsafeBlock(BaseModel):
-    """Represents an unsafe block within Rust code."""
-
-    start_line: int
-    end_line: int
-    reasons: List[UnsafeReason] = Field(default_factory=list)
-    explanation: Optional[str] = None  # Documentation explaining why unsafe is needed
-    containing_function: Optional[str] = None
-
-
 class RustType(BaseModel):
     """Represents a Rust type."""
 
@@ -66,6 +56,67 @@ class RustAttribute(BaseModel):
     is_inner: bool = False  # #![foo] vs #[foo]
 
 
+class RustGenericParam(BaseModel):
+    """Represents a generic type parameter in Rust."""
+
+    name: str
+    bounds: List[str] = Field(default_factory=list)  # Trait bounds
+    default_type: Optional[str] = None
+    is_const: bool = False  # For const generics
+
+
+class RustLifetimeParam(BaseModel):
+    """Represents a lifetime parameter in Rust."""
+
+    name: str
+    bounds: List[str] = Field(default_factory=list)  # Lifetime bounds
+
+
+class RustParameter(BaseModel):
+    """Represents a function parameter in Rust."""
+
+    name: str
+    type: RustType
+    is_self: bool = False  # For methods (self, &self, &mut self)
+    is_mut: bool = False  # For mutable bindings
+    default_value: Optional[str] = None
+
+
+class RustCallSite(BaseModel):
+    """Represents a location where a function is called."""
+
+    line_number: int
+    caller_function: Optional[str] = None
+    caller_module: Optional[str] = None
+    argument_types: List[RustType] = Field(default_factory=list)
+    is_unsafe_context: bool = False
+
+
+class RustVariableDeclaration(BaseModel):
+    """Represents a variable declaration in Rust."""
+
+    name: str
+    type: Optional[RustType] = None
+    is_mut: bool = False
+    is_static: bool = False
+    is_const: bool = False
+    initializer: Optional[str] = None
+    visibility: RustVisibility = RustVisibility.PRIVATE
+    doc_comment: Optional[str] = None
+    attributes: List[RustAttribute] = Field(default_factory=list)
+    line_number: int
+
+
+class UnsafeBlock(BaseModel):
+    """Represents an unsafe block within Rust code."""
+
+    start_line: int
+    end_line: int
+    reasons: List[UnsafeReason] = Field(default_factory=list)
+    explanation: Optional[str] = None  # Documentation explaining why unsafe is needed
+    containing_function: Optional[str] = None
+
+
 class SafetyAnalysis(BaseModel):
     """Analyzes and tracks safety-related information."""