refactor(orchestrator): log git install failures during startup

Sources/Zero/Services/ContainerOrchestrator.swift

@@ -25,10 +25,18 @@ class ContainerOrchestrator {
 
         // 3-1. Git 설치 (Alpine 기반 이미지에 git이 없을 경우)
         if image.contains("alpine") {
-            _ = try? dockerService.executeShell(container: containerName, script: "apk add --no-cache git")
+            do {
+                _ = try dockerService.executeShell(container: containerName, script: "apk add --no-cache git")
+            } catch {
+                AppLogStore.shared.append("ContainerOrchestrator git install failed (apk): \(error.localizedDescription)")
+            }
         } else if image.contains("openjdk") || image.contains("temurin") || image.contains("corretto") {
             // JDK 이미지들은 보통 Debian/Ubuntu 기반이므로 apt 사용
-            _ = try? dockerService.executeShell(container: containerName, script: "apt-get update && apt-get install -y git")
+            do {
+                _ = try dockerService.executeShell(container: containerName, script: "apt-get update && apt-get install -y git")
+            } catch {
+                AppLogStore.shared.append("ContainerOrchestrator git install failed (apt): \(error.localizedDescription)")
+            }
         }
 
         // 3. Git Clone (토큰 주입)

Tests/ZeroTests/ContainerOrchestratorTests.swift

@@ -7,6 +7,7 @@ class MockDockerService: DockerServiceProtocol {
     var lastContainerName: String?
     var lastImageName: String?
     var executedScripts: [String] = []
+    var shellErrorsByCommandSubstring: [String: Error] = [:]
 
     // 호환성을 위한 계산 속성
     var executedScript: String? {
@@ -20,11 +21,17 @@ class MockDockerService: DockerServiceProtocol {
     }
 
     func executeShell(container: String, script: String) throws -> String {
+        if let match = shellErrorsByCommandSubstring.first(where: { script.contains($0.key) }) {
+            throw match.value
+        }
         executedScripts.append(script)
         return "mock shell output"
     }
 
     func executeShellStreaming(container: String, script: String, onOutput: @escaping (String) -> Void) throws -> String {
+        if let match = shellErrorsByCommandSubstring.first(where: { script.contains($0.key) }) {
+            throw match.value
+        }
         executedScripts.append(script)
         let output = "mock shell output"
         onOutput(output)
@@ -57,9 +64,11 @@ final class ContainerOrchestratorTests: XCTestCase {
     override func setUp() {
         super.setUp()
         testStoreURL = FileManager.default.temporaryDirectory.appendingPathComponent("orchestrator_test.json")
+        AppLogStore.shared.clear()
     }
 
     override func tearDown() {
+        AppLogStore.shared.clear()
         try? FileManager.default.removeItem(at: testStoreURL)
         super.tearDown()
     }
@@ -100,4 +109,38 @@ final class ContainerOrchestratorTests: XCTestCase {
         let sessions = try sessionManager.loadSessions()
         XCTAssertEqual(sessions.count, 1)
     }
+
+    func testStartSessionLogsGitInstallFailureAndContinues() async throws {
+        // Given
+        let mockDocker = MockDockerService()
+        mockDocker.shellErrorsByCommandSubstring["apk add --no-cache git"] = NSError(
+            domain: "docker",
+            code: 1,
+            userInfo: [NSLocalizedDescriptionKey: "apk failed: temporary network error"]
+        )
+        let sessionManager = SessionManager(storeURL: testStoreURL)
+        let orchestrator = ContainerOrchestrator(
+            dockerService: mockDocker,
+            sessionManager: sessionManager
+        )
+
+        let repo = Repository(
+            id: 1,
+            name: "test-repo",
+            fullName: "user/test-repo",
+            isPrivate: false,
+            htmlURL: URL(string: "https://github.com/user/test-repo")!,
+            cloneURL: URL(string: "https://github.com/user/test-repo.git")!
+        )
+
+        // When
+        let session = try await orchestrator.startSession(repo: repo, token: "ghp_test_token")
+
+        // Then
+        XCTAssertEqual(session.repoURL, repo.cloneURL)
+        let logs = AppLogStore.shared.recentEntries()
+        XCTAssertTrue(logs.contains { entry in
+            entry.contains("ContainerOrchestrator git install failed") && entry.contains("apk failed")
+        })
+    }
 }