fix: Stop using Azure's EventHubs batch spanContext map for storing DD span contexts

[jcstorms1]

What does this PR do?

• Stores our span contexts in a weakMap
• Fixes failed tests on node 18 for the crypto package
• Adds a regression test for incorrect usage of tracePromise on a synchronous function
• Adds a regression test for using Azure's eventDataBatch._spanContexts map

Motivation

Originally we used Azure's built in spanContext map to store span context for our span links. This could cause conflicts with Azure Application Inights if OTel is enabled, because Azure uses this map to generate their span links.

Plugin Checklist

• Unit tests.
• Integration tests.
• Benchmarks.
• TypeScript definitions.
• TypeScript tests.
• API documentation.
• CI jobs/workflows.

Additional Notes

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.52%. Comparing base (a035e9b) to head (42c7423).
⚠️ Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6943   +/-   ##
=======================================
  Coverage   84.52%   84.52%           
=======================================
  Files         527      527           
  Lines       22534    22534           
=======================================
  Hits        19047    19047           
  Misses       3487     3487           

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[github-actions]

Overall package size

Self size: 4.37 MB
Deduped: 5.19 MB
No deduping: 5.19 MB

Dependency sizes

| name | version | self size | total size | |------|---------|-----------|------------| | import-in-the-middle | 2.0.0 | 68.46 kB | 797.03 kB | | dc-polyfill | 0.1.10 | 26.73 kB | 26.73 kB |

_{🤖 This report was automatically generated by heaviest-objects-in-the-universe}

[BridgeAR]

The tests are sadly still failing

[pr-commenter]

Benchmarks

Benchmark execution time: 2026-01-08 10:42:49

Comparing candidate commit 42c7423 in PR branch storms/refactor-event-hubs-batch-contexts with baseline commit a035e9b in branch master.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 288 metrics, 32 unstable metrics.

[BridgeAR]

Could you please add a regression test that checks that ctx.batch._spanContexts is not changed anymore?

[BridgeAR]

LGTM, while it would be nice to undo the unrelated changes :)

[BridgeAR]

LGTM, it would just be nice if the unrelated changes could be undone before landing :)

[BridgeAR]

LGTM! Thank you for cleaning things up :)