feat(lock): introduce LockConfiguration for configurable lock timing

[mO-sarfaRAZ]

Summary

Lock timing (TTL, wait timeout, retry interval) was hardcoded in LockBase,
giving consumers no way to tune behaviour for their SLOs. This PR introduces
LockConfiguration — a simple, immutable config object — to make these
values configurable per instance

Motivation

Services have widely different SLOs. A payment service may need a 30 s TTL with a
500 ms retry interval; a batch job can tolerate the 90 s defaults. Previously, the
only way to override these values was to pass explicit Duration arguments on every
acquireLock call — error-prone and inconsistent across a codebase.

Changes

• LockConfiguration — new @Builder value object with three Duration
  fields (lockTtl, waitForLock, retryInterval) and sensible @Builder.Default
  values matching the existing hardcoded constants
• LockBase — wires in LockConfiguration; removes the old static constants
• LockConfigurationTest — 7 unit tests covering defaults, custom values,
  partial config, and builder backward compat
• README — documents the new configuration option
• Javadocs — updated to reference LockConfiguration for default values

Backward Compatibility

Zero breaking changes. Existing LockBase.builder() calls compile and behave
identically — defaults are preserved via @Builder.Default.

// Custom configuration example
LockConfiguration.builder()
    .lockTtl(Duration.ofSeconds(30))
    .waitForLock(Duration.ofSeconds(10))
    .retryInterval(Duration.ofMillis(500))
    .build();

Backward Compatibility

This change is fully backward compatible. All existing builder calls:

LockBase.builder()
    .mode(LockMode.EXCLUSIVE)
    .lockStore(aerospikeStore)
    .build();

continue to compile and behave identically — @Builder.Default ensures the LockConfiguration with 90 s / 90 s / 1 s defaults is applied automatically.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud