fix: ignored objects should be excluded from fingerprint calc

[tianzhou]

Fix #107

[Copilot]

Pull Request Overview

This PR fixes issue #107 by ensuring that ignored objects are excluded from fingerprint calculations. The main changes consolidate two database IR retrieval functions into one that always accepts an ignore configuration parameter.

• Merged GetIRFromDatabase and GetIRFromDatabaseWithIgnoreConfig into a single function
• Updated fingerprint validation in the apply command to use ignore configuration
• Enhanced integration tests to verify ignored objects are properly excluded from fingerprints

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
cmd/util/connection.go	Consolidated two functions into one GetIRFromDatabase that accepts ignore config parameter; reorganized imports
cmd/plan/plan.go	Updated function call to use consolidated GetIRFromDatabase; reorganized imports and removed blank line
cmd/apply/apply.go	Added ignore config loading before fingerprint validation and passed it to validation function; removed blank line
cmd/ignore_integration_test.go	Expanded test to verify ignored objects are excluded from fingerprint calculation with comprehensive schema and verification

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