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Add library-management module: console app evolved into a Spring Boot 4 REST API

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Stage 2 console classes and the shared LoanPolicy, then a Spring Boot 4.1.2 + JPA API
(H2, @Version optimistic locking, problem+json errors). Tests write output/ transcripts
while asserting the same numbers; scripts regenerate everything.

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_017ic4b4DPL6dtpFg4U4LHc2
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Claude
2026-11-14 21:21:16 +05:30
parent b9aeb78b24
commit 26ece9cc9b
38 changed files with 1444 additions and 0 deletions
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library-management/output/04-query-count.txt
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5 loans, each with its own book and its own member
findAllByOrderByIdAsc() then read book title + member name: 11 SQL statements
findAllWithDetails() (join fetch) then the same reads: 1 SQL statement
LoanService.listLoans() as called by GET /api/loans: 1 SQL statement