Add boot4-migration module: one Boot 3.5.16 service migrated to 4.1.2, with the real compile, start-up, silent and test failures captured at each step

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_017ic4b4VQVEJWetTT1dYzyJ
This commit is contained in:
2026-10-29 05:57:26 +00:00
co-authored by Claude Sonnet 5.5
parent fd0cf9b527
commit 85074ed51a
45 changed files with 1021 additions and 0 deletions
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# GET /summary on the same bean (id, title, createdAt, author declared in that order)
Boot 3.5.16 (Jackson 2): {"id":1,"title":"Hello","createdAt":"2026-01-02T03:04:05Z","author":"ankur"} -> HTTP 200
Boot 4.1.2 (Jackson 3, defaults): {"author":"ankur","createdAt":"2026-01-02T03:04:05Z","id":1,"title":"Hello"} -> HTTP 200
Boot 4.1.2 + spring.jackson.use-jackson2-defaults: {"id":1,"title":"Hello","createdAt":"2026-01-02T03:04:05Z","author":"ankur"} -> HTTP 200