feat: add CockroachDB database adapter

[bpamiri]

Summary

• Adds a dedicated CockroachDB database adapter that extends the PostgreSQL adapter
• CockroachDB uses the PostgreSQL wire protocol but enforces strict type checking — the PostgreSQL adapter maps boolean columns to cf_sql_bit, which causes unsupported comparison operator: <boolean> = <integer> errors on CockroachDB
• The CockroachDB adapter overrides $getType() to map bool/boolean to cf_sql_boolean, which the JDBC driver correctly sends as a native boolean parameter
• Detection uses database_productname (which CockroachDB reports as "CockroachDB") before the PostgreSQL driver_name check, since CockroachDB uses the standard PostgreSQL JDBC driver

Changes

• New: databaseAdapters/CockroachDB/CockroachDBModel.cfc — extends PostgreSQLModel, overrides boolean type mapping
• New: databaseAdapters/CockroachDB/CockroachDBMigrator.cfc — extends PostgreSQLMigrator
• Modified: Model.cfc — adds CockroachDB detection before PostgreSQL check
• Modified: migrator/Base.cfc — adds CockroachDB detection for migrations
• Modified: migrator/Migration.cfc — updates supported database list in error message

Test plan

• Verify CockroachDB is detected correctly when using the PostgreSQL JDBC driver (database_productname = "CockroachDB")
• Verify boolean columns use cf_sql_boolean parameter type, resolving strict type comparison errors
• Verify existing PostgreSQL databases continue to use the PostgreSQL adapter unchanged
• Verify migrations work with CockroachDB via the extended migrator

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