Bump version to v3.1.1.

[willhickey]

We're abandoning the -beta prerelease suffix in v3.1 but will begin using it in v4.0. More context here: #8606

There's nothing in this change except the version bump

$ glol -2
372919c86c 2025-11-14 13:47:31 -0600  (HEAD -> v3.1.1_bump, willhickey/v3.1.1_bump)  [email protected] Bump version to v3.1.1.
99945ca72d 2025-11-13 21:35:23 -0600  (agave/v3.1, v3.1)  [email protected] deprecate `solana-stake-program` (#8860)
$ git diff v3.1..HEAD  | grep -vE "^ |^@@ |^--- |^\+\+\+ |^index |^diff |^-( \")?(solana|agave).*3.1.0|^\+( \")?(solana|agave).*3.1.1|^-version|^\+version"
$

[steviez]

This manual PR is necessary to get out of "suffix mode" right ? Ie, you'll presumably tag v3.1.1 shortly after landing this at which point, one of our pipelines will (hopefully) create the bump to v3.1.2 PR ? Is that right ?

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.1%. Comparing base (99945ca) to head (372919c).
⚠️ Report is 1 commits behind head on v3.1.

Additional details and impacted files

@@           Coverage Diff           @@
##             v3.1    #9083   +/-   ##
=======================================
  Coverage    83.1%    83.1%           
=======================================
  Files         865      865           
  Lines      375401   375401           
=======================================
+ Hits       312292   312320   +28     
+ Misses      63109    63081   -28     

🚀 New features to boost your workflow:

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

[willhickey]

This manual PR is necessary to get out of "suffix mode" right ? Ie, you'll presumably tag v3.1.1 shortly after landing this at which point, one of our pipelines will (hopefully) create the bump to v3.1.2 PR ? Is that right ?

Correct. This PR is mostly the same as #8895 except for places where intervening PRs changed lock files (eg #8860 and #8954). Starting fresh was safer than manually resolving the conflicts

[steviez]

This one will need BP approval too so giving it a ship it, but given #8606 (comment), I'm inclined to think Trent is also on board