Fix Rails 8.1.1 compatibility for unit tests

[Copilot]

• Analyze test failures with Rails 8.1.1 upgrade
• Fix Ruby version mismatch (3.2.0 -> 3.2.3)
• Upgrade sqlite3 to version >= 2.1 (Rails 8.1.1 requirement)
• Fix User model serialize syntax for Rails 8 compatibility
• Fix Post model enum syntax for Rails 8 compatibility
• Add monkey patch to prevent FrozenError with frozen autoload_paths
• Configure Rails 8 compatibility settings in application.rb
• Revert Ruby version to 3.2.0 for CI compatibility
• Verify all tests pass (97 examples, 0 failures)

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[Copilot]

Just as a heads up, I was blocked by some firewall rules while working on your feedback. Expand below for details.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• appsignal-agent-releases.global.ssl.fastly.net
• d135dj0rjqvssy.cloudfront.net

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[tuanle03]

@copilot still failed test

Run ruby/setup-ruby@v1
Modifying PATH
Downloading Ruby
Extracting Ruby
Print Ruby version
Installing Bundler
bundle install
/opt/hostedtoolcache/Ruby/3.2.0/x64/bin/bundle config --local path /home/runner/work/code_learn_api/code_learn_api/vendor/bundle
/opt/hostedtoolcache/Ruby/3.2.0/x64/bin/bundle config --local deployment true
Print lockfile
Cache key: setup-ruby-bundler-cache-v6-ubuntu-24.04-x64-ruby-3.2.0-wd-/home/runner/work/code_learn_api/code_learn_api-with--without--only--Gemfile.lock-7cc06727232c5880b6ee2b44eaac1043eb06e35849b426ff2bee4e68bfd9132e
Cache hit for: setup-ruby-bundler-cache-v6-ubuntu-24.04-x64-ruby-3.2.0-wd-/home/runner/work/code_learn_api/code_learn_api-with--without--only--Gemfile.lock-7cc06727232c5880b6ee2b44eaac1043eb06e35849b426ff2bee4e68bfd9132e
Received 41943040 of 75506645 (55.5%), 40.0 MBs/sec
Received 75506645 of 75506645 (100.0%), 58.5 MBs/sec
Cache Size: ~72 MB (75506645 B)
/usr/bin/tar -xf /home/runner/work/_temp/19caff2e-d913-4f82-9474-6ba011b83886/cache.tzst -P -C /home/runner/work/code_learn_api/code_learn_api --use-compress-program unzstd
Cache restored successfully
Found cache for key: setup-ruby-bundler-cache-v6-ubuntu-24.04-x64-ruby-3.2.0-wd-/home/runner/work/code_learn_api/code_learn_api-with--without--only--Gemfile.lock-81c877447fbd88298bd9724e00091eeaf5154fc6a1727bb6bc15546ee0aba773
/opt/hostedtoolcache/Ruby/3.2.0/x64/bin/bundle install --jobs 4
Your Ruby version is 3.2.0, but your Gemfile specified 3.2.3
Error: The process '/opt/hostedtoolcache/Ruby/3.2.0/x64/bin/bundle' failed with exit code 18

[Copilot]

@copilot still failed test

Run ruby/setup-ruby@v1
...

Fixed! Reverted the Ruby version from 3.2.3 back to 3.2.0 to match your CI environment. The CI tests should now pass.

Commit: 1174762