v1.3.7: 性能优化 - 移除 fetch 操作，纯本地缓存读取

- 移除工作空间模式下的 fetch 操作
- 改为纯读取本地缓存 refs（瞬间响应）
- 无缓存时回退到 ls-remote 等其他方法
- 更新日志说明使用缓存策略

Author: jicheng

pom.xml

@@ -11,7 +11,7 @@
 
     <groupId>io.jenkins.plugins</groupId>
     <artifactId>active-git-branches-plugin</artifactId>
-    <version>1.3.5</version>
+    <version>1.3.7</version>
     <packaging>hpi</packaging>
 
     <name>Active Git Branches Parameter</name>

src/main/java/io/jenkins/plugins/activegitbranches/ActiveGitBranchesParameterDefinition.java

@@ -315,23 +315,17 @@ private List<BranchInfo> fetchBranchesFromWorkspace(FilePath workspace) throws I
             git.addCredentials(repositoryUrl, credentials);
         }
 
-        // Fetch latest refs from remote (lightweight, only updates refs)
-        try {
-            git.fetch_().from(new URIish(repositoryUrl), Collections.emptyList()).execute();
-            LOGGER.info("Fetched latest refs from remote");
-        } catch (Exception e) {
-            LOGGER.log(Level.WARNING, "Failed to fetch from remote, using cached refs", e);
-        }
-        
-        // Read local refs (now up-to-date)
+        // Read cached local refs (instant, no network)
         List<BranchInfo> localRefs = readLocalRefs(git);
+        
+        // If we have cached refs, use them directly (fast path)
         if (!localRefs.isEmpty()) {
-            LOGGER.info("Using local refs (" + localRefs.size() + " branches)");
+            LOGGER.info("Using cached local refs (" + localRefs.size() + " branches)");
             return applyLimits(localRefs);
         }
 
-        // No local refs found, return null to fall back to other methods
-        LOGGER.info("No local refs found in workspace, will use fallback method");
+        // No cached refs in workspace, return null to fall back to ls-remote
+        LOGGER.info("No cached refs in workspace, falling back to other method");
         return null;
     }