RDKEMW-14887 : Update Stats.memoryUsage api to return value in bytes

[swethasukumarr]

No description provided.

[Copilot]

Pull request overview

Updates the Stats.memoryUsage API surface to report memory values in bytes (instead of KiB), aligning the C++ types, JSON parsing, tests, and OpenRPC specs/examples with the new contract.

Changes:

• Switched Firebolt::Stats::MemoryInfo fields from uint32_t to uint64_t and updated JSON deserialization to read byte-based field names.
• Updated unit/component tests and the API demo app to validate/display byte-based values and updated field names.
• Updated OpenRPC specifications (core, legacy, and app schemas) to reflect byte units, new property names, and updated examples.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
test/unit/statsTest.cpp	Updates unit assertions to use byte-field names and uint64_t expectations.
test/component/statsTest.cpp	Updates component assertions to use byte-field names and uint64_t expectations.
test/api_test_app/apis/statsDemo.cpp	Updates demo output strings to explicitly label values as bytes.
src/json_types/stats.h	Updates required JSON fields and parsing to userMemoryUsed/userMemoryLimit/gpuMemoryUsed/gpuMemoryLimit as uint64_t.
include/firebolt/stats.h	Updates public API struct field types to uint64_t and clarifies bytes in the doc comment.
docs/openrpc/the-spec/firebolt-open-rpc.json	Updates Stats.memoryUsage summary, example payload, and schema property names/descriptions to bytes.
docs/openrpc/the-spec/firebolt-open-rpc--legacy.json	Mirrors the same bytes/property-name updates for the legacy spec.
docs/openrpc/the-spec/firebolt-app-open-rpc.json	Updates the app-facing MemoryInfo schema to byte-based property names and constraints.
docs/openrpc/openrpc/stats.json	Updates the module OpenRPC definition (summary, examples, schema) to byte-based fields.