GH-96 File-based migrator

[dzikoysk]

No description provided.

[Copilot]

Pull request overview

Adds a new file-based SQL migrator (GH-96) that can apply ordered *.sql scripts from a classpath index file, track applied scripts with checksums in sqiffy_metadata, and optionally import existing Liquibase state to support seamless cutovers.

Changes:

• Introduces FileMigrator with checksum drift policies and optional one-time Liquibase state import.
• Adds supporting components: ChangelogIndex (index parsing + path resolution), ChangelogLedger (metadata-backed ledger), and a pluggable ResourceLoader.
• Adds end-to-end tests + test migration resources, and extends migration docs to cover the new migrator.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
sqiffy/src/main/kotlin/com/dzikoysk/sqiffy/migrator/SqiffyMigrator.kt	Adjusts metadata key column declaration/comment to accommodate file-migrator ledger keys.
sqiffy/src/main/kotlin/com/dzikoysk/sqiffy/migrator/ResourceLoader.kt	Adds resource loading abstraction (classpath default) for migration index/scripts.
sqiffy/src/main/kotlin/com/dzikoysk/sqiffy/migrator/FileMigrator.kt	Implements the new file-based migrator, checksum policy handling, and Liquibase import.
sqiffy/src/main/kotlin/com/dzikoysk/sqiffy/migrator/ChangelogLedger.kt	Implements reading/writing applied-changeset ledger entries in sqiffy_metadata.
sqiffy/src/main/kotlin/com/dzikoysk/sqiffy/migrator/ChangelogIndex.kt	Implements parsing and resolving migration paths from an index file; adds checksum helpers.
sqiffy-test/src/test/resources/filemigrator/changelog.index	Adds test changelog index manifest for file migrator E2E coverage.
sqiffy-test/src/test/resources/filemigrator/1.0.0/001-create-users.sql	Adds test migration script 001.
sqiffy-test/src/test/resources/filemigrator/1.0.0/002-add-email.sql	Adds test migration script 002.
sqiffy-test/src/test/resources/filemigrator/1.0.0/003-add-counter-function.sql	Adds multi-statement/dollar-quoted test migration script 003.
sqiffy-test/src/test/kotlin/com/dzikoysk/sqiffy/e2e/FileMigratorE2ETest.kt	Adds E2E tests for idempotency, checksum drift policies, and Liquibase import scenarios.
sqiffy-docs/guide/migrations.md	Documents the new file migrator and Liquibase cutover flow.

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[Copilot]

Pull request overview

Copilot reviewed 11 out of 11 changed files in this pull request and generated 4 comments.

[Copilot]

Pull request overview

Copilot reviewed 11 out of 11 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 14 out of 14 changed files in this pull request and generated 2 comments.