Fix railsmaster CI with pglite 0.1.1 compatibility shim

[MattyMc]

pglite 0.1.1 is missing a few PG-compatible connection APIs that Rails main now calls during connection setup. It also returns nil for parameter_status("TimeZone"), which causes Rails to send a session time zone SET statement that crashes the wasm instance.

This PR adds a small compatibility shim for pglite 0.1.1 so the railsmaster CI job can run until pglite releases native support for these APIs.

Fixes #62

What is the purpose of this pull request?

Fix the railsmaster CI job when running against pglite 0.1.1.

What changes did you make? (overview)

Added a version-pinned compatibility patch for pglite <= 0.1.1 that:

• defines PG::CONNECTION_OK if missing
• adds PGlite::Connection#close
• makes #finished? report the connection as open
• adds #status
• returns "UTC" for parameter_status("TimeZone") so Rails does not send a time zone SET

The patch is intentionally scoped to pglite <= 0.1.1 so it should retire once pglite ships the missing compatibility methods.

Is there anything you'd like reviewers to focus on?

The main thing to review is whether spec_helper.rb is the right place for this temporary shim. It needs to run before any support files trigger database access.

Checklist

• I've added tests for this change. Test already exists, the CI pipeline fail
• I've added a Changelog entry
• I've updated a documentation (Readme). N/A