RCBC-551: FIT performer - add support for CounterEq bounds type

[DemetrisChr]

Should be merged after #237

Changes

• Adding support for the CounterEq bounds type, where the driver effectively tells the performer when to stop executing the workload
• Implement the SetCounter and ClearAllCounters RPCs
• Refactored the bounds code more generally, and created classes for the bounds type that implement the same interface (#can_execute?)
• Counters are now global at the performer-level (as required by the new spec) and represented by a Concurrent::AtomicFixnum

[Copilot]

Pull request overview

This PR extends the FIT performer to support the new counter_eq bounds type (where the driver can signal a workload to stop by mutating a shared counter), introduces performer-global counters, and wires in the new setCounter / clearAllCounters RPCs. It also refactors workload bounds handling into dedicated bounds classes implementing a common #can_execute? interface.

Changes:

• Refactor bounds evaluation into FIT::Performer::Bounds::* classes and update workloads to loop on @bounds.can_execute?.
• Introduce performer-global counters backed by Concurrent::AtomicFixnum, plus setCounter / clearAllCounters service endpoints.
• Thread executor and workload construction updated to pass a shared counters container into workloads.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
fit-performer/lib/fit/performer/workloads/sdk_workload.rb	Updates execution loop to rely on @bounds.can_execute? and adjusts signatures to accept global counters at init.
fit-performer/lib/fit/performer/workloads/base_workload.rb	Creates bounds object during workload initialization (now requires bounds module).
fit-performer/lib/fit/performer/workloads.rb	Passes the global counters container through workload construction.
fit-performer/lib/fit/performer/service.rb	Adds global counters lifecycle plus set_counter / clear_all_counters RPC implementations.
fit-performer/lib/fit/performer/multi_thread_executor.rb	Passes shared counters to workloads and simplifies workload invocation to execute(results).
fit-performer/lib/fit/performer/counters.rb	New thread-safe counters container (currently has a deadlock issue in set_counter_value).
fit-performer/lib/fit/performer/bounds.rb	New bounds factory (currently incorrectly reads counter_eq using counter).
fit-performer/lib/fit/performer/bounds/simple.rb	New “run once through commands” bounds implementation.
fit-performer/lib/fit/performer/bounds/for_time.rb	New time-based bounds implementation.
fit-performer/lib/fit/performer/bounds/counter.rb	New counter-decrement bounds implementation (minor doc typo).
fit-performer/lib/fit/performer/bounds/counter_equality.rb	New counter-equality bounds implementation (baseline semantics likely need alignment with proto initial value).

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[Copilot]

Pull request overview

Copilot reviewed 11 out of 11 changed files in this pull request and generated 4 comments.