[NPU] Human readable plugin metadata

[alexandruenache1111]

Details:

• adding methods for metadata to read/write most of its contents in a human-readable form
• some metadata fields are not written in text form since they are considered irrelevant to compatibility check

Tickets:

• C-180876

AI Assistance:

• AI assistance used: no / yes
• If yes, summarize how AI was used and what human validation was performed (build/tests/manual checks).

[Copilot]

Pull request overview

This PR extends the Intel NPU blob metadata format to v2.5 by adding an optional “compiler requirements/runtime requirements” string, and introduces a human-readable metadata serialization/parsing path intended for compatibility-string generation (with I/O layouts excluded).

Changes:

• Bump metadata version to 2.5 and add binary read/write support for an optional compiler requirements string.
• Add human-readable metadata read/write APIs (per-version) plus a tensor entry point to parse HR metadata.
• Extend unit tests to cover binary round-trip for the new compiler requirements field.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 5 comments.

File	Description
src/plugins/intel_npu/src/plugin/include/metadata.hpp	Adds HR read/write APIs to MetadataBase, introduces v2.5 metadata specialization, bumps CURRENT_METADATA_VERSION to 2.5.
src/plugins/intel_npu/src/plugin/src/metadata.cpp	Implements v2.5 binary read/write + HR serialization/parsing utilities and HR reader entry point.
src/plugins/intel_npu/tests/unit/npu/metadata_version.cpp	Updates test fixture ctor and adds unit tests for binary compiler requirements round-trip (including empty-string behavior).

[Copilot]

Pull request overview

Adds support for exporting/importing NPU plugin metadata in a human-readable key/value format, and extends the binary metadata format with a new v2.5 field for compiler/runtime requirements.

Changes:

• Introduce write_human_readable() / read_human_readable() APIs on metadata versions and add a parser for the human-readable format.
• Bump metadata to METADATA_VERSION_2_5 and serialize/deserialize an optional compiler requirements string.
• Add unit tests covering the new binary field and human-readable round-trips.

Reviewed changes

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

File	Description
src/plugins/intel_npu/tests/unit/npu/metadata_version.cpp	Adds binary metadata v2.5 unit tests for compiler/runtime requirements string.
src/plugins/intel_npu/tests/unit/npu/metadata_hr.cpp	New unit tests for human-readable metadata serialization/parsing across versions.
src/plugins/intel_npu/src/plugin/src/metadata.cpp	Implements metadata v2.5 field I/O and human-readable serialization/parsing logic.
src/plugins/intel_npu/src/plugin/include/metadata.hpp	Extends metadata API with human-readable methods and defines v2.5/current version.

[Copilot]

Pull request overview

This PR extends the Intel NPU plugin metadata system by introducing a human-readable (text) serialization/deserialization path and bumping the metadata minor version to add a compiler requirements string, while excluding I/O layouts from the human-readable compatibility representation.

Changes:

• Add metadata version 2.5 with a new compiler requirements string field (get_runtime_reqs()).
• Implement write_as_text() / read_as_text() across metadata versions, plus a key-value text parser.
• Add unit tests covering binary and human-readable round-trips for the new fields (notably compiler requirements).

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
src/plugins/intel_npu/tests/unit/npu/metadata_version.cpp	Extends binary metadata unit tests to cover v2.5 compiler requirements and bounds checking.
src/plugins/intel_npu/tests/unit/npu/metadata_hr.cpp	Adds new unit tests for human-readable metadata round-tripping across versions/fields.
src/plugins/intel_npu/src/plugin/src/metadata.cpp	Implements v2.5 binary read/write, human-readable read/write, and text parsing helpers.
src/plugins/intel_npu/src/plugin/include/metadata.hpp	Updates public metadata API for human-readable methods, adds v2.5 declarations, and new accessor.

[Copilot]

Pull request overview

This PR extends the Intel NPU plugin blob metadata to support a new version (2.6) that carries a compiler requirements string and introduces human-readable (text) serialization/deserialization for most metadata fields, while intentionally omitting layouts/encryption from the human-readable compatibility string.

Changes:

• Add METADATA_VERSION_2_6 with runtime/compiler requirements string support and wire it into read/write paths.
• Introduce human-readable metadata I/O (write_as_text, read_as_text) and a text parser for key/value fields.
• Update plugin parsing logic for the updated is_encrypted_blob() API and add/extend unit tests (including new HR tests).

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/plugins/intel_npu/tests/unit/npu/metadata_version.cpp	Extends unit coverage for new metadata fields (compiler requirements) and bounds checking.
src/plugins/intel_npu/tests/unit/npu/metadata_hr.cpp	Adds unit tests for human-readable metadata round-tripping and field omission behavior.
src/plugins/intel_npu/src/plugin/src/plugin.cpp	Adjusts encrypted-blob handling to the new optional-returning is_encrypted_blob() API.
src/plugins/intel_npu/src/plugin/src/metadata.cpp	Implements v2.6 field read/write, adds human-readable read/write + parsing, and strengthens tensor read bounds checks.
src/plugins/intel_npu/src/plugin/include/metadata.hpp	Updates metadata versioning, extends API for HR I/O and runtime requirements, and changes encryption flag accessor to std::optional<bool>.

[Copilot]

Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated 3 comments.