refactor: enhance test framework with automated resource tracking and scripted error capture capabilities

addons/godot_ai/runtime/loggers/validation_logger.gd

@@ -0,0 +1,43 @@
+@tool
+extends Logger
+
+## Short-lived Logger used only for per-write validation loads.
+##
+## Unlike editor_logger.gd this deliberately has no addon feedback-loop filter:
+## the caller attaches it around one ResourceLoader.load() call, reads its
+## private buffer, and immediately removes it. The shared editor logger should
+## still drop these validation-load errors so logs_read(source="editor") stays
+## clean.
+
+const _LogBacktrace := preload("res://addons/godot_ai/utils/log_backtrace.gd")
+
+var _buffer
+
+
+func _init(buffer = null) -> void:
+	_buffer = buffer
+
+
+func _log_error(
+	function: String,
+	file: String,
+	line: int,
+	code: String,
+	rationale: String,
+	_editor_notify: bool,
+	error_type: int,
+	script_backtraces: Array,
+) -> void:
+	if _buffer == null:
+		return
+	var resolved := _LogBacktrace.resolve_error(
+		function,
+		file,
+		line,
+		code,
+		rationale,
+		error_type,
+		script_backtraces,
+	)
+	var details: Dictionary = resolved.get("details", {})
+	_buffer.append(resolved.level, resolved.message, resolved.path, resolved.line, resolved.function, details)