Speed up server CI tests (#2537)

* perf(ci): reduce server test latency

Server test files use isolated resources, so they do not require suite-wide serialization.

* fix(ci): scope server test parallelism to unit suite

Keep real-provider and local-resource suites serialized because they may share user configuration and account limits.

* fix(terminal): isolate zsh runtimes by process

Prevent concurrent daemon and test processes from deleting or replacing shell integration files used by another process.

* fix(ci): preserve required matrix check names

GitHub evaluates job conditions before expanding a matrix. Expand active matrices first and gate their expensive steps so required check contexts are always reported. Allow superseded runs to cancel while retaining fail-open path detection.

packages/server/src/terminal/terminal.posix.test.ts

@@ -253,7 +253,7 @@ function lastNonEmptyLineIsPrompt(state: ReturnType<TerminalSession["getState"]>
 }
 
 function removeZshShellIntegrationRuntimeDir(): void {
-  rmSync(join(tmpdir(), `${userInfo().username || "unknown"}-paseo-zsh`), {
+  rmSync(join(tmpdir(), `${userInfo().username || "unknown"}-paseo-zsh-${process.pid}`), {
     recursive: true,
     force: true,
   });
@@ -272,7 +272,9 @@ describe.skipIf(isPlatform("win32"))("terminal POSIX-only", () => {
     expect(resolvedEnv.TERM).toBe("xterm-256color");
     expect(resolvedEnv.TERM_PROGRAM).toBe("kitty");
     expect(resolvedEnv.PASEO_ZSH_ZDOTDIR).toBe("/tmp/paseo-zdotdir");
-    expect(resolvedEnv.ZDOTDIR).not.toBe("/tmp/paseo-zdotdir");
+    expect(resolvedEnv.ZDOTDIR).toBe(
+      join(tmpdir(), `${userInfo().username || "unknown"}-paseo-zsh-${process.pid}`),
+    );
     expect(existsSync(join(resolvedEnv.ZDOTDIR, ".zshenv"))).toBe(true);
     expect(existsSync(join(resolvedEnv.ZDOTDIR, "paseo-integration.zsh"))).toBe(true);
   });

packages/server/src/terminal/terminal.ts

@@ -384,7 +384,7 @@ function resolveZshShellIntegrationRuntimeDir(): string {
   } catch {
     // keep fallback
   }
-  return join(tmpdir(), `${username}-paseo-zsh`);
+  return join(tmpdir(), `${username}-paseo-zsh-${process.pid}`);
 }
 
 function prepareZshShellIntegrationRuntimeDir(sourceDir = resolveZshShellIntegrationDir()): string {