✨ [RUM-16985] Capture wasm module build_ids and enrich error events

[ImaneLargou]

Motivation

Browser WebAssembly runtime errors currently lack the module metadata required for WASM symbolication.

This change identifies errors containing WebAssembly stack frames and reports the loaded WASM module URL and build ID. This allows the error-processing pipeline to distinguish ordinary browser errors from errors that should use WASM/DWARF symbolication.

Related upstream schema change: DataDog/rum-events-format#427

Changes

• Track WebAssembly modules loaded through:
  • WebAssembly.instantiate
  • WebAssembly.instantiateStreaming
  • WebAssembly.compile
  • WebAssembly.compileStreaming
• Extract module build IDs from the build_id custom section, with external_debug_info as a fallback.
• Detect WASM errors by checking the complete error stack for WASM-specific frames.
• Report the following metadata on WASM errors:
  • error.source_type: "browser+wasm"
  • error.wasm_modules, containing the module URL and build ID
• Add support to both RUM and Browser Logs.
• Keep ordinary JavaScript errors unchanged. In particular, .js frames do not qualify an error as WASM.
• Update the generated RUM event types from the corresponding rum-events-format schema change.

Test instructions

Run the relevant unit tests:

• packages/browser-core/src/domain/wasmModules/wasmBinaryParser.spec.ts
• packages/browser-core/src/domain/wasmModules/wasmModuleTracking.spec.ts
• packages/browser-rum-core/src/domain/error/errorCollection.spec.ts
• packages/browser-logs/src/domain/createErrorFieldFromRawError.spec.ts

Run the E2E scenario:

yarn test:e2e -g "send WebAssembly runtime errors with module metadata"

The E2E test loads a real .wasm module using WebAssembly.instantiateStreaming, triggers a runtime error, and verifies that both RUM and Logs events contain:

  {
    "source_type": "browser+wasm",
    "wasm_modules": [
      {
        "url": "<test module URL>",
        "build_id": "abcd"
      }
    ]
  }

Checklist

• Tested locally
• Tested on staging
• Added unit tests for this change.
• Added e2e/integration tests for this change.
• Updated documentation and/or relevant AGENTS.md file

[github-actions]

All contributors have signed the CLA ✍️ ✅
_{Posted by the CLA Assistant Lite bot.}

[datadog-official]

🎉 All green!

🧪 All tests passed
❄️ No new flaky tests detected

🎯 Code Coverage (details)
• Patch Coverage: 79.55%
• Overall Coverage: 77.24% (+0.03%)

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: 420fdee | Docs | Datadog PR Page | Give us feedback!}

[cit-pr-commenter-54b7da]

Bundles Sizes Evolution

📦 Bundle Name	Base Size	Local Size	𝚫	𝚫%	Status
Rum	180.44 KiB	183.27 KiB	+2.83 KiB	+1.57%	✅
Rum Profiler	8.43 KiB	8.43 KiB	0 B	0.00%	✅
Rum Recorder	21.12 KiB	21.12 KiB	0 B	0.00%	✅
Logs	57.04 KiB	59.78 KiB	+2.74 KiB	+4.81%	✅
Rum Salesforce	N/A	141.21 KiB	N/A	N/A	N/A
Rum Slim	138.47 KiB	141.24 KiB	+2.77 KiB	+2.00%	✅
Worker	22.96 KiB	22.96 KiB	0 B	0.00%	✅
Rum Shopify	N/A	202.75 KiB	N/A	N/A	N/A
Rum-shopify Profiler	N/A	8.43 KiB	N/A	N/A	N/A
Rum-shopify Recorder	N/A	3.72 KiB	N/A	N/A	N/A

[ImaneLargou]

I have read the CLA Document and I hereby sign the CLA