P14-03: Prove new-PID pairs inside the roster; declare UIDs and policy pins

- tests/s2/test_new_pid_pairs.gd runs each writer/reader save-restart pair as
  two real child processes and keeps their complete output in the private
  profile, since the script-level roster runs suites without arguments.
- Commit the Godot UIDs of scripts added this session (and the pre-existing
  peeping-room scripts that lacked tracked UIDs) plus the legacy fixture's
  thumbnail import, so a private import generates nothing undeclared.
- Repin suite-policy source SHAs for test_main_dashboard (A06 HUD, palette 25)
  and test_runtime_transport (sustained outage helper); flags unchanged.
- Register the pair suite's completion marker.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/s2/test_mana_recovery_new_pid.gd.uid

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+uid://bdhjn1ujekdi3

tests/s2/test_mana_reserve_new_pid.gd.uid

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+uid://c340fnfuwchcs

tests/s2/test_new_pid_pairs.gd

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+extends SceneTree
+
+## Runs every writer/reader save-restart pair as two real child Godot processes
+## (distinct PIDs) from this one suite, so a script-level regression roster also
+## proves the new-PID halves. Each child's complete stdout+stderr and exit code
+## are kept under user://pair-evidence/ (inside the run's private profile);
+## summaries printed here avoid completion-marker wording on purpose.
+const PAIRS: Array[String] = [
+	"res://tests/s2/test_mana_reserve_new_pid.gd",
+	"res://tests/s2/test_mana_recovery_new_pid.gd",
+	"res://tests/transport/test_runtime_warp.gd",
+	"res://tests/mvp/test_whole_tower_outage.gd",
+	"res://tests/transport/test_route_wait_choice.gd",
+]
+const EVIDENCE_DIR := "user://pair-evidence"
+var _checks := 0
+var _failures := 0
+
+
+func _initialize() -> void:
+	call_deferred("_run")
+
+
+func _run() -> void:
+	var engine := OS.get_executable_path()
+	var project := ProjectSettings.globalize_path("res://")
+	DirAccess.make_dir_recursive_absolute(ProjectSettings.globalize_path(EVIDENCE_DIR))
+	print("New-PID pairs: parent pid %d engine %s" % [OS.get_process_id(), engine])
+	for script: String in PAIRS:
+		var pids := {}
+		for mode: String in ["writer", "reader"]:
+			var output: Array = []
+			var code := OS.execute(engine, ["--headless", "--path", project, "--script", script, "--", mode], output, true)
+			var text := "".join(output)
+			var name := "%s.%s" % [script.get_file().get_basename(), mode]
+			var file := FileAccess.open(EVIDENCE_DIR.path_join(name + ".log"), FileAccess.WRITE)
+			file.store_string(text)
+			file.close()
+			var pid := _child_pid(text)
+			pids[mode] = pid
+			var passed := code == 0 and _child_marker_passed(text)
+			print("  pair %s %s exit=%d child_pid=%d bytes=%d sha256=%s" % [script.get_file(), mode, code, pid, text.to_utf8_buffer().size(), text.sha256_text()])
+			_expect(passed, "%s %s child completes with zero failures" % [script.get_file(), mode])
+		_expect(int(pids["writer"]) > 0 and int(pids["reader"]) > 0 and pids["writer"] != pids["reader"] and pids["reader"] != OS.get_process_id(), "%s writer and reader ran in distinct processes" % script.get_file())
+	print("%s: %d checks" % ["PASS" if _failures == 0 else "FAIL", _checks])
+	quit(_failures)
+
+
+## Each pair script prints its own pid on its first line ("... pid N" or "(pid N)").
+static func _child_pid(text: String) -> int:
+	var regex := RegEx.new()
+	regex.compile("pid (\\d+)")
+	var found := regex.search(text)
+	return int(found.get_string(1)) if found != null else -1
+
+
+static func _child_marker_passed(text: String) -> bool:
+	var regex := RegEx.new()
+	regex.compile("(?m)^PASS: (\\d+) checks$")
+	var found := regex.search(text)
+	return found != null and int(found.get_string(1)) > 0 and not text.contains("FAIL:") and not text.contains("SCRIPT ERROR")
+
+
+func _expect(condition: bool, label: String) -> void:
+	_checks += 1
+	if not condition:
+		_failures += 1
+		push_error("  ✗ %s" % label)

tests/s2/test_new_pid_pairs.gd.uid

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+uid://bykhpoojytbrd

tests/s2/test_runtime_mana_reserve.gd.uid

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+uid://cewrt8dc6d4hi