chore: prepare 0.13.1 release

0.13.1 was bumped in pom.xml and added to the CHANGELOG but never tagged
or released (latest real tag/release is v0.13.0). Fold the OkHttp read
timeout fix into the still-unreleased 0.13.1 and set the release date,
so we ship 0.13.1 (env API key support + read timeout fix) with no
version gap. No pom change needed; version already reads 0.13.1.

Author: isasmendiagus

CHANGELOG.md

@@ -7,9 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
-## [0.13.1] - 2026-03-25
+## [0.13.1] - 2026-07-01
 ### Added
 - Added support to load a SCANOSS API key from an environment variable (`SCANOSS_API_KEY`) if available.
+### Fixed
+- Disabled OkHttp's default read timeout so long-running scans are bounded only by the overall call timeout, preventing premature failures on large payloads.
 
 ## [0.13.0] - 2026-02-04
 ### Added