## Issue
Closes#5798
## Change
When `logRequests`/`logResponses` are enabled, `AwsLoggingInterceptor`
logs the full HTTP header set. Because `beforeTransmission` runs after
SigV4 signing, this includes the `Authorization` header (access key ID +
signature) and, when temporary/STS credentials are used (assumed roles,
EC2/ECS/EKS instance roles, IAM Identity Center), the
`X-Amz-Security-Token` a live, replayable session token writing
credentials to whatever log sink is configured (CWE-532).
This PR masks the values of these two headers (case-insensitive) with
`[REDACTED]` before logging, via a small package-private `maskHeaders()`
helper. This matches the header redaction already used elsewhere in
langchain4j (core `HttpRequestLogger`, and the cohere/jina/ovh-ai/nomic
request logging interceptors) and the AWS SDK's own wire logging, which
never emits these values.
All other headers, URL, query parameters, and body are logged unchanged.
No public API or request-behavior change only debug log text. Adds
`AwsLoggingInterceptorTest` (7 unit tests covering redaction of both
headers, case variants, non-sensitive header preservation, multi-value
headers, and null/empty maps).
Note: the import re-sort in the diff is mandated by the repo's spotless
config (matches sibling `BedrockCustomHeadersInterceptor`); no other
reformatting was done. `spotless:check` passes.
## General checklist
<!-- Please double-check the following points and mark them like this:
[X] -->
- [X] There are no breaking changes (API, behaviour)
- [X] I have added unit and/or integration tests for my change
- [X] The tests cover both positive and negative cases
- [X] I have manually run all the unit and integration tests in the
module I have added/changed, and they are all green
- [ ] I have manually run all the unit and integration tests in the
[core](https://github.com/langchain4j/langchain4j/tree/main/langchain4j-core)
and
[main](https://github.com/langchain4j/langchain4j/tree/main/langchain4j)
modules, and they are all green
## Checklist for adding new maven module
<!-- Please double-check the following points and mark them like this:
[X] -->
- [ ] I have added my new module in the root `pom.xml` and
`langchain4j-bom/pom.xml`
## Checklist for adding new embedding store integration
<!-- Please double-check the following points and mark them like this:
[X] -->
- [ ] I have added a `{NameOfIntegration}EmbeddingStoreIT` that extends
from either `EmbeddingStoreIT` or `EmbeddingStoreWithFilteringIT`
- [ ] I have added a `{NameOfIntegration}EmbeddingStoreRemovalIT` that
extends from `EmbeddingStoreWithRemovalIT`
## Checklist for changing existing embedding store integration
<!-- Please double-check the following points and mark them like this:
[X] -->
- [ ] I have manually verified that the
`{NameOfIntegration}EmbeddingStore` works correctly with the data
persisted using the latest released version of LangChain4j
c27e6e9c2d