[pashidlos]

README for 6.0 and the licence in the POM. This is phase 2, part C.

Stacked on #122. Merge it after #122 (merge order #124 → #125 → #122 → this PR). The README describes Java 25 and the 6.0 install, so it ships with #122 as 6.0.0. It contains no code changes. It also notes that apiUrl trailing slashes are ignored (#124).

README

The README follows the template shared by the SDKs:

• Install: Gradle and Maven via JitPack, plus an "Upgrading to 6.0" section.
• Configuration:
  • one table of every option with its VRT_* variable;
  • builder, environment and vrt.json examples;
  • the precedence rule.
• Usage, with the image table: Path, byte[] (multipart) and base64. Then TestRunOptions, including comment and merge.
• Result and statuses: the six statuses plus UNKNOWN, and which of them throw.
• Errors: TestRunException.getStatusCode(), what 413, 422 and 503 mean, and the retry policy.
• Releasing: tag plus GitHub release; JitPack builds it. Includes the exact command JitPack runs, and why the artifact version is the tag.
• Links and the licence.

Two things removed: the Codacy badge (phase 2 removes Codacy) and the old Java 11 requirement. The ${REPLACE_THIS_VALUE} placeholder from the audit was already gone on master.

Each claim was checked against the code and the 6.0 backend:

• a repeated ciBuildId continues the build (upsert on projectId_ciBuildId);
• merge only matters when the run is approved;
• the JSON limit is 5 MB only in the shipped .env.

Licence

LICENSE is Apache-2.0, and GitHub detects it as Apache-2.0. The published POM now declares it too, with name and url. JitPack used to add this only from GitHub metadata.

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Additional details and impacted files

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  Hits            ?      247           
  Misses          ?       18           
  Partials        ?        4           

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