Part of kcenon/common_system#454

What

Add benchmark version 1.8.3 to the vcpkg.json overrides array. All 7 other ecosystem systems pin benchmark to 1.8.3, but monitoring_system does not.

• Current: overrides contains grpc (1.51.1), protobuf (3.21.12), gtest (1.14.0) — no benchmark
• Expected: overrides also includes { "name": "benchmark", "version": "1.8.3" }
• Scope: vcpkg.json overrides section only

Why

• monitoring_system uses the testing feature which pulls in Google Benchmark
• All 7 peer systems (common, thread, logger, container, database, network, pacs) pin benchmark to 1.8.3
• Without the override, vcpkg may resolve a different benchmark version, causing potential ABI mismatch when monitoring_system is linked alongside other ecosystem libraries in a consumer project
• Ecosystem standard defined in DEPENDENCY_MATRIX.md: benchmark 1.8.3

Where

• vcpkg.json line ~17: after the existing gtest override entry

How

Technical Approach

Add one entry to the overrides array:

"overrides": [
    { "name": "grpc", "version": "1.51.1" },
    { "name": "protobuf", "version": "3.21.12" },
    { "name": "gtest", "version": "1.14.0" },
    { "name": "benchmark", "version": "1.8.3" }
]

Acceptance Criteria

• benchmark override at version 1.8.3 is present in vcpkg.json
• No other overrides are modified
• vcpkg install resolves without version conflict warnings