Simplify gemspec and remove Juwelier

[yahonda]

Summary

• Remove Juwelier from Gemfile
• Simplify gemspec: read version from VERSION file, replace hardcoded s.files list with Dir[...], remove Juwelier-generated boilerplate (required_rubygems_version, s.date, s.rubygems_version, specification_version branching), and drop activerecord/oracle_enhanced-adapter from gemspec dev dependencies (managed by Gemfile)

Motivation

This simplifies the release process. Now that #240 (release workflow with trusted publishing) is merged, releasing a new version of ruby-plsql becomes:

1. Update the VERSION file
2. Push a v* tag

That's it — the release workflow builds the gem and publishes it to RubyGems via trusted publishing. No need for Juwelier's rake gemspec, manual gemspec version edits, or local gem push.

Both ruby-plsql.gemspec and lib/plsql/version.rb read from the VERSION file, so there is only one place to update.

Test plan

• gem build ruby-plsql.gemspec succeeds
• Built gem contains the expected files (lib, VERSION, License.txt, README.md, History.txt)
• CI passes

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Removes Juwelier and simplifies the gemspec to make releases driven by the VERSION file and a minimal, deterministic file manifest.

Changes:

• Removed juwelier from the Gemfile and gemspec-generated boilerplate.
• Updated gemspec to read s.version from the VERSION file and use Dir[...] for packaged files.
• Trimmed gemspec development dependencies (moving some dev deps responsibility to the Gemfile).

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
ruby-plsql.gemspec	Drops Juwelier boilerplate; reads version from VERSION; simplifies packaged files and dev deps.
Gemfile	Removes Juwelier dependency from development group.

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