feat: implement prometheus metrics for edgex devices (#1800)

[SoumyaRaikwar]

What type of PR is this?

/kind feature
/sig iot

What this PR does / why we need it:

This PR implements a Prometheus-based metrics exporter for EdgeX devices managed by yurt-iot-dock. It addresses the lack of observability for EdgeX device status and resource usage.
Key changes include:

• Metrics Client: Extended the EdgeX V3 device client to fetch metrics from Core Metadata and Core Command services.
• Prometheus Exporter: Implemented a custom EdgeXCollector in yurt-iot-dock that scrapes these metrics and exposes them via the standard controller metrics endpoint.
• Integration: Wired the exporter into the yurt-iot-dock manager lifecycle.
  This allows users to monitor EdgeX components using standard Prometheus/Grafana stacks integrated with OpenYurt.

Which issue(s) this PR fixes:

Fixes #1800

Special notes for your reviewer:

The implementation reuses existing files (cmd/yurt-iot-dock/app/core.go and pkg/yurtiotdock/clients/edgex-foundry/v3/device_client.go) to keep the file footprint minimal, as requested during development.

Does this PR introduce a user-facing change?

Feature: Support Prometheus metrics collection for EdgeX devices in yurt-iot-dock.

[SoumyaRaikwar]

@charleszheng44 This PR implements a Prometheus-based metrics exporter for EdgeX devices managed by yurt-iot-dock. It addresses the lack of observability for EdgeX device status and resource usage. could you take a look

[codecov]

Codecov Report

❌ Patch coverage is 65.43210% with 28 lines in your changes missing coverage. Please review.
✅ Project coverage is 44.20%. Comparing base (d32d27f) to head (6606704).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
cmd/yurt-iot-dock/app/core.go	59.18%	19 Missing and 1 partial ⚠️
...g/yurtiotdock/clients/edgex-foundry/edgexobject.go	0.00%	6 Missing ⚠️
...tiotdock/clients/edgex-foundry/v3/device_client.go	92.30%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2496      +/-   ##
==========================================
+ Coverage   43.88%   44.20%   +0.31%     
==========================================
  Files         399      399              
  Lines       26560    26606      +46     
==========================================
+ Hits        11657    11761     +104     
+ Misses      13843    13780      -63     
- Partials     1060     1065       +5     

Flag	Coverage Δ
unittests	44.20% <65.43%> (+0.31%)	⬆️

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[zyjhtangtang]

@SoumyaRaikwar Please focus on the blocking issues in the code detection.

[SoumyaRaikwar]

@SoumyaRaikwar Please focus on the blocking issues in the code detection.

@zyjhtangtang done addressed the blocking issues in latest updatte

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[SoumyaRaikwar]

@zyjhtangtang @rambohe-ch, could you please review this pr