refactor: renaem record shell.sh.tmpl to just .sh since no longer a template

internal/miro/record_shell.go

@@ -12,8 +12,8 @@ import (
 
 const recordShellName = "shell.sh"
 
-//go:embed record_shell.sh.tmpl
-var recordShellTemplateFS embed.FS
+//go:embed record_shell.sh
+var recordShellFS embed.FS
 
 func recordShellPath(testDir string) string {
 	return filepath.Join(testDir, recordShellName)
@@ -63,9 +63,9 @@ func resolveRecordShell(testDir string) (string, error) {
 }
 
 func buildRecordShellScript() string {
-	body, err := recordShellTemplateFS.ReadFile("record_shell.sh.tmpl")
+	body, err := recordShellFS.ReadFile("record_shell.sh")
 	if err != nil {
-		panic(fmt.Sprintf("read record shell template: %v", err))
+		panic(fmt.Sprintf("read record shell: %v", err))
 	}
 
 	return string(body)

internal/miro/record_shell.sh

@@ -1,11 +1,9 @@
 #!/bin/sh
 set -eu
 
-# Host directory mounted as the sandboxed HOME.
+# hoisted vars to fail fast if any missing
 host_home=${MIRO_HOST_HOME:?}
-# Host temp directory mounted read-write inside the sandbox.
 host_tmp=${MIRO_HOST_TMP:?}
-# PATH value forwarded into the sandbox so required tools stay available.
 path_env=${MIRO_PATH_ENV:?}
 visible_home=${MIRO_VISIBLE_HOME:?}