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

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
2026-11-14 21:21:16 +05:30
parent b9aeb78b24
commit 26ece9cc9b
38 changed files with 1444 additions and 0 deletions
@@ -0,0 +1,4 @@
+8 threads borrow the last copy at once (read, check, write: no @Version)
+successful borrows : 8
+loan rows in DB    : 8   <- one copy, 8 loans
+availableCopies    : 0   <- the counter says everything is fine