Add spec for OptionsExtractor

[bhawsartanmay]

OptionsExtractor had no direct test coverage despite being the shared
utility called by all PostgreSQL migration extension paths
(schema_statements_pg.rb, table_pg.rb).

Adds 13 examples covering:

• Default :amount and :currency extraction
• Custom prefix/postfix column name building
• Explicit column_name override
• present: false
• Extra column options (type, precision, scale)
• String vs symbol table names

[sunny]

👏🏻

[bhawsartanmay]

👏🏻

Hi @sunny , thank you for approving my PR.

It looks like the CI failure is related to a JRuby compatibility issue between Rails 7.1 / ActiveRecord 7.1 and the JDBC adapter stack. The Rails 7.0 suite passes successfully, but Rails 7.1 fails with:

Java::JavaLang::NoSuchMethodError:
'void org.jruby.RubyHash.<init>(org.jruby.Ruby, int)'

The error originates from arjdbc.jdbc.RubyJdbcConnection, so it seems related to the ARJDBC adapter compatibility with the current JRuby version.

[sunny]

Thanks @bhawsartanmay!