refactor: simplify normalizer and remove formatter

[tianzhou]

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[Copilot]

Pull Request Overview

This PR refactors the normalization logic to simplify view definition processing by consolidating the approach around a custom formatter. Since both desired and current states now come from database inspection (embedded-postgres), the PR removes legacy parser-specific code and focuses on minimal, formatter-based transformations.

Key changes:

• Replaces AST-based normalization with a streamlined custom formatter approach
• Removes unused functions for table qualifier removal and expression fingerprinting
• Consolidates "= ANY (ARRAY[...])" to "IN (...)" conversion into the custom formatter

Reviewed Changes

Copilot reviewed 35 out of 36 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
testdata/diff/online/alter_constraint/*	Updated test expectations to include explicit type casts (::pg_catalog.numeric) in constraint definitions
testdata/diff/online/add_constraint/*	Updated test expectations to include explicit type casts in constraint definitions
testdata/diff/migrate/v*/plan.json	Updated source fingerprint hashes to reflect changes in normalization output
testdata/diff/create_view/alter_view/*	Updated view definition formatting including explicit type casts, parenthesized ORDER BY expressions, and adjusted whitespace
testdata/diff/create_view/add_view_coalesce/*	Removed entire test case files (old.sql, new.sql, diff.sql, plan.* files)
testdata/diff/create_view/add_view_array_operators/*	Removed entire test case files
testdata/diff/create_view/add_view/*	Replaced employee_department_view test with array_operators_view and text_search_view tests
ir/normalize.go	Major refactoring: removed legacy normalization functions, simplified view definition processing, consolidated formatter usage
ir/formatter.go	Added newline formatting to CASE expressions for improved readability

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[Copilot]

Pull Request Overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

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