style: use region instead of location

Author: badmonster0

python/cocoindex/llm.py

@@ -23,7 +23,7 @@ class VertexAiConfig:
     kind = "VertexAi"
 
     project: str
-    location: str | None = None
+    region: str | None = None
 
 
 @dataclass

src/llm/gemini.rs

@@ -259,7 +259,7 @@ impl LlmGenerationClient for VertexAiClient {
         let model = format!(
             "projects/{}/locations/{}/publishers/google/models/{}",
             self.config.project,
-            self.config.location.as_deref().unwrap_or("global"),
+            self.config.region.as_deref().unwrap_or("global"),
             request.model
         );
 

src/llm/mod.rs

@@ -23,7 +23,7 @@ pub enum LlmApiType {
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct VertexAiConfig {
     pub project: String,
-    pub location: Option<String>,
+    pub region: Option<String>,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]