test(replay): use portable seam executables

tests/applicationWorkflowMcp.test.ts

@@ -87,10 +87,10 @@ describe("application workflow MCP parity", () => {
       enabled: true,
       roots: [root],
       nodePath: process.execPath,
-      bubblewrapPath: "/usr/bin/bwrap",
-      systemdRunPath: "/usr/bin/systemd-run",
-      systemctlPath: "/usr/bin/systemctl",
-      shellPath: "/usr/bin/bash",
+      bubblewrapPath: process.execPath,
+      systemdRunPath: process.execPath,
+      systemctlPath: process.execPath,
+      shellPath: process.execPath,
     };
     const ceiling = {
       capability: "javascript_replay" as const,

tests/javascriptReplay.test.ts

@@ -22,10 +22,10 @@ const policy: JavaScriptReplayPolicy = {
   enabled: true,
   roots: [root],
   nodePath: process.execPath,
-  bubblewrapPath: "/usr/bin/bwrap",
-  systemdRunPath: "/usr/bin/systemd-run",
-  systemctlPath: "/usr/bin/systemctl",
-  shellPath: "/usr/bin/bash",
+  bubblewrapPath: process.execPath,
+  systemdRunPath: process.execPath,
+  systemctlPath: process.execPath,
+  shellPath: process.execPath,
 };
 
 const host: JavaScriptReplayHost = {