[ESI] Telemetry implementation exposing metrics over MMIO

[teqdruid]

Instead of creating a DMA channel per metric, aggregate them and show them over MMIO.

[Copilot]

Pull Request Overview

This PR refactors the telemetry service implementation to use MMIO (Memory-Mapped I/O) instead of channels. The telemetry class is renamed from Telemetry to Metric to better reflect its purpose.

Key changes:

• Renamed TelemetryService::Telemetry to TelemetryService::Metric across all C++ and Python bindings
• Replaced channel-based telemetry implementation with MMIO-based reads using register offsets
• Added TelemetryMMIO service implementation in Python that assigns each telemetry client a register in MMIO space

Reviewed Changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
lib/Dialect/ESI/runtime/python/esiaccel/esiCppAccel.cpp	Updated Python bindings to expose Metric class with new readInt method
lib/Dialect/ESI/runtime/cpp/tools/esitester.cpp	Updated to use Metric and new readInt() method for reading telemetry
lib/Dialect/ESI/runtime/cpp/tools/esiquery.cpp	Updated type references from Telemetry to Metric
lib/Dialect/ESI/runtime/cpp/lib/Services.cpp	Refactored telemetry service to use MMIO, added safer any_cast with pointer checks, implemented readInt() method
lib/Dialect/ESI/runtime/cpp/include/esi/Services.h	Updated class definition from Telemetry to Metric, added MMIO support fields
lib/Dialect/ESI/runtime/cpp/include/esi/Common.h	Added toString() helper method to AppID struct
lib/Dialect/ESI/runtime/cpp/include/esi/Accelerator.h	Moved ServiceTable typedef to Services.h for better modularity
lib/Dialect/ESI/runtime/cpp/lib/Manifest.cpp	Removed unused ServiceTable typedef
lib/Dialect/ESI/ESIStdServices.cpp	Changed telemetry 'get' channel width from 1 bit to 0 bits (void type)
frontends/PyCDE/src/pycde/esi.py	Added TelemetryMMIO implementation, updated channel widths, fixed type annotations
frontends/PyCDE/src/pycde/bsp/xrt.py	Added TelemetryMMIO service instantiation
frontends/PyCDE/src/pycde/bsp/cosim.py	Added TelemetryMMIO service instantiation
frontends/PyCDE/integration_test/esitester.py	Added instance names to module instantiations for better identification

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[mortbopet]

Would be nice that these things are centralized/documented somewhere, so that we don't have these stray magic strings.