feat: Support incremental mode:

- Support incremental mode in heromodels
- Updated the example to refelct the changes
- Updated the tests to reflect the changes

heromodels_core/src/lib.rs

@@ -59,13 +59,14 @@ pub trait Model:
     }
 
     /// Get the unique ID for this model
+    /// Returns 0 if the ID is None
     fn get_id(&self) -> u32;
 
     /// Get a mutable reference to the base_data field
     fn base_data_mut(&mut self) -> &mut BaseModelData;
 
     /// Set the ID for this model
-    fn id(mut self, id: u32) -> Self
+    fn id(mut self, id: Option<u32>) -> Self
     where
         Self: Sized,
     {
@@ -98,7 +99,7 @@ pub trait Index {
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct BaseModelData {
     /// Unique incremental ID per circle
-    pub id: u32,
+    pub id: Option<u32>,
 
     /// Unix epoch timestamp for creation time
     pub created_at: i64,
@@ -112,7 +113,7 @@ pub struct BaseModelData {
 
 impl BaseModelData {
     /// Create a new BaseModelData instance
-    pub fn new(id: u32) -> Self {
+    pub fn new(id: Option<u32>) -> Self {
         let now = chrono::Utc::now().timestamp();
         Self {
             id,
@@ -123,7 +124,7 @@ impl BaseModelData {
     }
 
     /// Create a new BaseModelDataBuilder
-    pub fn builder(id: u32) -> BaseModelDataBuilder {
+    pub fn builder(id: Option<u32>) -> BaseModelDataBuilder {
         BaseModelDataBuilder::new(id)
     }
 
@@ -147,7 +148,7 @@ impl BaseModelData {
 
 /// Builder for BaseModelData
 pub struct BaseModelDataBuilder {
-    id: u32,
+    id: Option<u32>,
     created_at: Option<i64>,
     modified_at: Option<i64>,
     comments: Vec<u32>,
@@ -155,7 +156,7 @@ pub struct BaseModelDataBuilder {
 
 impl BaseModelDataBuilder {
     /// Create a new BaseModelDataBuilder
-    pub fn new(id: u32) -> Self {
+    pub fn new(id: Option<u32>) -> Self {
         Self {
             id,
             created_at: None,