feat: add network diagnostics and state dump action

[kamuikatsurgi]

Description

Adds the reusable network diagnostics and state dump action from the pos-workflows repo.

[claude]

Code Review

Issue Found

File: .github/workflows/kurtosis-e2e.yml (line 156)

Problem: Debug/test code left in. The exit 1 on line 156 will cause the RPC tests step to always fail immediately without running any actual tests.

      - name: Run RPC tests
        id: rpc-tests
        working-directory: pos-workflows/tests/rpc_tests
        run: |
          exit 1  # <-- Remove this line
          export RPC_URL=$(kurtosis port print ${{ env.ENCLAVE_NAME }} l2-el-1-bor-heimdall-v2-validator rpc)

Impact: This will break the CI pipeline by causing all builds to fail at the RPC tests step without actually running any tests. The new diagnostics collection action will trigger on every run.

Suggested Fix: Remove the exit 1 line before merging.

---

Checked for bugs and CLAUDE.md compliance.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.17%. Comparing base (96df644) to head (c955f13).
⚠️ Report is 1 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2051      +/-   ##
===========================================
+ Coverage    50.15%   50.17%   +0.02%     
===========================================
  Files          871      871              
  Lines       150614   150614              
===========================================
+ Hits         75546    75578      +32     
+ Misses       70023    69992      -31     
+ Partials      5045     5044       -1     

see 16 files with indirect coverage changes
see 16 files with indirect coverage changes

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[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