feat(java): support Spring AOP (@Aspect/@Around/@Before) via pointcut-based CALLS edges

[YutenC]

Summary

Spring AOP uses @Aspect classes with pointcut expressions to intercept method calls at runtime. These relationships are currently invisible in CRG.

@Aspect
@Component
public class LoggingAspect {
    @Around("execution(* com.example.service.*.*(..))")
    public Object logAround(ProceedingJoinPoint joinPoint) throws Throwable {
        // wraps every method in com.example.service
    }
}

Proposed approach

Emit CALLS edges from aspect methods to matched target methods by parsing AspectJ pointcut expressions.

Parse phase:

• Detect @Aspect class
• Extract pointcut strings from @Around / @Before / @After / @AfterReturning / @AfterThrowing
• Parse the AspectJ execution() pattern and match against method nodes in the graph

Complexity considerations

AspectJ pointcut expressions are a rich DSL (wildcards, boolean operators, annotations, named references). Options:

1. Regex approximation — handle execution() pattern covering ~80% of real-world cases; explicitly unsupported for call(), within(), named pointcuts
2. External library — depend on an AspectJ parsing library if license compatible
3. Metadata-only — emit a node ASPECT::LoggingAspect with the pointcut string in extra, no CALLS edges; lets users query via get_knowledge_gaps

Option 1 is the most pragmatic starting point and suitable as a PR. Happy to implement if the maintainers are interested in this direction.

Related PRs (same Spring annotation series)

• fix(java): correct Lombok @RequiredArgsConstructor/@AllArgsConstructor DI semantics #589 — Lombok @RequiredArgsConstructor/@AllArgsConstructor DI semantics fix
• feat(java): detect @Scheduled methods and emit TRIGGERS edges #590 — @Scheduled TRIGGERS edges
• feat(java): detect Spring @EventListener/publishEvent() and emit HANDLES/PUBLISHES edges #591 — @EventListener HANDLES/PUBLISHES/CALLS edges