chore(AD-5): upgrade Spring Boot to 3.3.7 to fix CVE-2024-56337

[devin-ai-integration]

Summary

Upgrades Spring Boot from 2.6.3 to 3.3.7 to remediate CVE-2024-56337 (TOCTOU race condition in Apache Tomcat tomcat-embed-core). Spring Boot 3.3.7 pulls in tomcat-embed-core 10.1.x which contains the fix.

This is a major version upgrade (Boot 2 → 3) requiring the following cascading changes:

• Java 11 → 17 (minimum for Boot 3.x)
• Gradle 7.4 → 8.10.2 (required by Boot 3.3.7 plugin)
• javax.* → jakarta.* namespace migration across all servlet/validation imports (~20 files)
• Spring Security 6 migration: replaced WebSecurityConfigurerAdapter with SecurityFilterChain bean; antMatchers → requestMatchers; authorizeRequests → authorizeHttpRequests
• JJWT 0.11.2 → 0.12.6: new builder API (subject(), expiration(), parser().verifyWith(), parseSignedClaims(), getPayload())
• DGS 4.9.21 → 9.1.3: switched to graphql-dgs-spring-graphql-starter; exception handler now returns CompletableFuture<DataFetcherExceptionHandlerResult>; PageInfo switched from graphql.relay.DefaultPageInfo to generated types
• Other dep bumps: MyBatis 2.2.2 → 3.0.4, REST Assured 4.5.1 → 5.5.0, SQLite JDBC 3.36 → 3.46, joda-time 2.10 → 2.13
• CustomizeExceptionHandler: HttpStatus → HttpStatusCode in method signature (Boot 3 API change)

All 68 existing tests pass locally.

Review & Testing Checklist for Human

• JWT signing algorithm change: The old code explicitly used SignatureAlgorithm.HS512 with SecretKeySpec. The new code uses Keys.hmacShaKeyFor(secret.getBytes()) which infers the algorithm from key byte length (≥64 → HS512, ≥48 → HS384, ≥32 → HS256). The configured secret in application.properties is 60 bytes → HS384, not HS512. This means any existing JWTs signed with the old code will fail to verify. Verify this is acceptable or adjust the secret to be ≥64 bytes.
• Security filter chain equivalence: Verify the WebSecurityConfig rewrite preserves the same authorization rules — particularly that GET /articles/feed still requires auth, and POST /users, POST /users/login remain public.
• DGS Spring GraphQL starter compatibility: The DGS starter changed from graphql-dgs-spring-boot-starter to graphql-dgs-spring-graphql-starter. Verify GraphQL endpoints (/graphql, /graphiql) still work correctly at runtime.
• Run the application end-to-end: Start the app, register a user, create an article, and verify the full flow works. Local test pass ≠ runtime correctness for a major framework upgrade.

Notes

• The CI workflow (gradle.yml) was intentionally removed per PR Remove GitHub Actions CI workflow #411, so there is no automated CI to validate this PR.
• javax.crypto imports in DefaultJwtService were not migrated — this is correct as javax.crypto is part of the JDK, not Jakarta EE.
• Snyk checks on this PR can be ignored per team policy.

Link to Devin session: https://app.devin.ai/sessions/57df25bdaca94dc385a0572632d2bff9

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 4 additional findings.

[devin-ai-integration]

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