feat: use new with_advisory_lock

[seuros]

- Removed deprecated Rails 3/4 features
- Removed use_attr_accessible? and include_forbidden_attributes_protection? methods.
- Removed attr_accessible declarations.
- Fixed SQLite compatibility.
- Auto-disabled advisory locks for SQLite (since it doesn't support them) 
- SQLite will be supported if it behave, if causing maintenance burden, we  will remove.

This commit is transitional , further refactoring are required.

[Copilot]

Pull Request Overview

This PR transitions the project to use the new with_advisory_lock gem, removes deprecated Rails 3/4 features, and adds explicit SQLite compatibility handling.

• Removes attr_accessible support and related flags.
• Auto-disables advisory locks for SQLite and adds DB recreation logic for PostgreSQL/MySQL in tests.
• Bumps with_advisory_lock dependency in gemfiles and gemspec.

Reviewed Changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
test/test_helper.rb	Rework test DB reset to handle PostgreSQL/MySQL, skip for SQLite
test/support/tag_examples.rb	Remove obsolete use_attr_accessible?-based example
test/closure_tree/matcher_test.rb	Skip advisory lock tests on SQLite
lib/closure_tree/support_flags.rb	Remove deprecated mass-assignment methods
lib/closure_tree/support.rb	Add default advisory lock option based on adapter
lib/closure_tree/numeric_order_support.rb	Simplify adapter detection for numeric order support
gemfiles/*.gemfile	Add with_advisory_lock dependency to all test appraisals
closure_tree.gemspec	Update runtime dependency requirement for with_advisory_lock
Gemfile	Add with_advisory_lock for development environment

Comments suppressed due to low confidence (2)

test/test_helper.rb:88

• The variable connection_config may not be defined in this context. Consider using ActiveRecord::Base.connection_db_config.configuration_hash or ActiveRecord::Base.connection_config to obtain the current connection settings.

      if connection_config.is_a?(String)

lib/closure_tree/support.rb:23

• The method connection is undefined here. You should call model_class.connection or ActiveRecord::Base.connection to access the adapter.

      default_with_advisory_lock = !connection.adapter_name.downcase.include?('sqlite')