Code intelligence LSIF upload failed with "too large" even though < 200Mb in size

Summary

Attempting to upload an uncompressed 76Mb LSIF artifact for Gitlab code intelligence on gitlab.com fails with the error 413 Request Entity Too Large

Steps to reproduce

My CI job is defined as such & produces a 76Mb LSIF (see "relevant logs & screenshots" below)

webapp:code-intelligence(MR):
  stage: build-artifacts
  script:
    - npm ci --prefer-offline
    - npx @sourcegraph/scip-typescript index
    - |
       env \
       TAG="v0.4.0" \
       OS="$(uname -s | tr '[:upper:]' '[:lower:]')" \
       ARCH="$(uname -m | sed -e 's/x86_64/amd64/')" \
       bash -c 'curl --location "https://github.com/sourcegraph/scip/releases/download/$TAG/scip-$OS-$ARCH.tar.gz"' \
       | tar xzf - scip
    - chmod +x scip
    - ./scip convert --from index.scip --to dump.lsif
    - ls -alh
  artifacts:
    reports:
      lsif: dump.lsif

This is taken from the Gitlab docs here:

https://docs.gitlab.com/user/project/code_intelligence/#add-cicd-jobs-for-code-intelligence

What is the current bug behavior?

The LSIF file fails to upload and responseStatus=413 Request Entity Too Large status=413 is returned.

What is the expected correct behavior?

The file should be uploaded successfully as the limit on gitlab.com was increased to 200Mb in v17.6 and is documented here:

https://docs.gitlab.com/administration/instance_limits/#maximum-file-size-per-type-of-artifact

Relevant logs and/or screenshots

$ npm ci --prefer-offline
> webapp@0.1.0 preinstall
> node ../scripts/checkNodeVersion
added 1040 packages, and audited 1041 packages in 25s
250 packages are looking for funding
  run `npm fund` for details
11 vulnerabilities (1 low, 3 moderate, 2 high, 5 critical)
To address all issues, run:
  npm audit fix
Run `npm audit` for details.
$ npx @sourcegraph/scip-typescript index
+ /builds/j7E5SA6Na/1/insights-ltd/webapp/tsconfig.node.json (117ms)
.........................
+ /builds/j7E5SA6Na/1/insights-ltd/webapp (51s 562ms)
done /builds/j7E5SA6Na/1/insights-ltd/webapp/index.scip
$ env \ # collapsed multi-line command
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100 9577k  100 9577k    0     0  20.4M      0 --:--:-- --:--:-- --:--:-- 20.4M
$ chmod +x scip
$ ./scip convert --from index.scip --to dump.lsif
$ ls -alh
total 115M
drwxr-xr-x.   5 ci ci  16K Sep  2 09:05 .
drwxr-xr-x.   8 ci ci  134 Sep  2 09:03 ..

... snip ...

-rw-r--r--.   1 ci ci  76M Sep  2 09:05 dump.lsif
-rw-r--r--.   1 ci ci  17M Sep  2 09:05 index.scip
-rwxr-xr-x.   1 ci ci  22M Jun 11  2024 scip

... snip ...

Uploading artifacts for successful job
01:18
Uploading artifacts...
webapp/dump.lsif: found 1 matching artifact files and directories 
ERROR: Uploading artifacts as "lsif" to coordinator... 413 Request Entity Too Large  correlation_id=80214fa591b343459f0a7e30a9bb2219 id=11213435909 responseStatus=413 Request Entity Too Large status=413 token=6a_iRxLKQ
FATAL: too large                                   
Cleaning up project directory and file based variables
00:01
ERROR: Job failed: exit code 1

Output of checks

This bug happens on GitLab.com