update OV to 22nd June build

[dtrawins]

🛠 Summary

🧪 Checklist

• Unit tests added.
• The documentation updated.
• Change follows security best practices.
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[Copilot]

Pull request overview

Updates OpenVINO / OpenVINO GenAI dependencies to the June 22 nightly build and aligns OVMS tokenization request parsing with the expected API behavior (ensuring max_length implies truncation).

Changes:

• Bump OpenVINO / Tokenizers / GenAI source commit pins and nightly binary URLs to 2026.3.0.0.dev20260622.
• Enforce OVMS tokenize API contract by setting truncation=true when max_length is provided.
• Update demo export requirements and unit test expectations to match the new dependency/build behavior.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
versions.mk	Updates OpenVINO/Tokenizers/GenAI commit pins and nightly package URLs to the 2026-06-22 build.
src/tokenize/tokenize_parser.cpp	Sets truncation=true when parsing max_length for tokenize requests.
src/test/tokenize_parser_test.cpp	Updates unit test to assert truncation is set when max_length is present.
demos/common/export_models/requirements.txt	Bumps OpenVINO/OpenVINO-tokenizers nightly versions and the optimum-intel git pin for model export tooling.