feat(process-discovery): add process_tags and container_id to TracerMetadata

[tlhunter]

What does this PR do?

Adds two new fields to the process tracking metadata and upgrades the underlying version of libdatadog.

Motivation

https://github.com/DataDog/dd-trace-js/pull/7816/changes

Additional Notes

I'm getting a bunch of build errors about lacking binaries for certain platforms. The LLM decided to pin the version of prebuildify to fix it. I'm sure this isn't the right approach but I'm unfamiliar with the project and don't know the solution.

Running test/process-discovery.js
/__w/libdatadog-nodejs/libdatadog-nodejs/load.js:36
  throw new Error(`Could not find a ${name} binary for ${PLATFORM}${LIBC}-${ARCH} nor a ${name} WASM module.`)
  ^

Error: Could not find a process-discovery binary for linuxmusl-x64 nor a process-discovery WASM module.
    at Object.load (/__w/libdatadog-nodejs/libdatadog-nodejs/load.js:36:9)
    at Object.<anonymous> (/__w/libdatadog-nodejs/libdatadog-nodejs/test/process-discovery.js:8:38)
    at Module._compile (node:internal/modules/cjs/loader:1829:14)
    at Object..js (node:internal/modules/cjs/loader:1969:10)
    at Module.load (node:internal/modules/cjs/loader:1552:32)
    at Module._load (node:internal/modules/cjs/loader:1354:12)
    at wrapModuleLoad (node:internal/modules/cjs/loader:255:19)
    at Module.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:154:5)
    at node:internal/main/run_main_module:33:47

Node.js v25.8.1
error Command failed with exit code 1.

[github-actions]

Overall package size

Self size: 36.05 MB
Deduped: 36.05 MB
No deduping: 36.05 MB

Dependency sizes

| name | version | self size | total size | |------|---------|-----------|------------|

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