Add attrs to partial gran spans & tracking metrics

[hmstepanek]

Overview

• Add fragmentation tracking metric for when we run out of space to add more nr.ids in compact mode.
• Add nr.pg to entry span to track when a transaction is partial granularity.
• Keep error attributes on partial granularity spans.
• Only record partial granularity type supportability metric if partial granularity transactions are actually sent.
• Small fixup to logic to make it more clear (not a==b => a!=b).

[github-actions]

✅MegaLinter analysis: Success

Descriptor	Linter	Files	Fixed	Errors	Warnings	Elapsed time
✅ ACTION	actionlint	7		0	0	0.93s
✅ MARKDOWN	markdownlint	7	0	0	0	1.35s
✅ PYTHON	ruff	970	1	0	0	0.99s
✅ PYTHON	ruff-format	970	3	0	0	0.39s
✅ YAML	prettier	15	0	0	0	1.46s
✅ YAML	v8r	15		0	0	6.15s
✅ YAML	yamllint	15		0	0	0.69s

See detailed reports in MegaLinter artifacts

[codecov-commenter]

Codecov Report

❌ Patch coverage is 13.33333% with 13 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (develop-hybrid-core-tracing@378c2c6). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
newrelic/core/node_mixin.py	0.00%	10 Missing and 1 partial ⚠️
newrelic/api/transaction.py	0.00%	1 Missing ⚠️
newrelic/core/transaction_node.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@                      Coverage Diff                       @@
##             develop-hybrid-core-tracing    #1608   +/-   ##
==============================================================
  Coverage                               ?   73.56%           
==============================================================
  Files                                  ?      213           
  Lines                                  ?    25018           
  Branches                               ?     3970           
==============================================================
  Hits                                   ?    18404           
  Misses                                 ?     5057           
  Partials                               ?     1557           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.