Update Python version from 3.11 to 3.14

[chrisburr]

BEGINRELEASENOTES

CHANGE: Update Python version from 3.11 to 3.14

ENDRELEASENOTES

[maxnoe]

I'm a bit confused why the CI is green here, as I get:

❯ mamba env create -n diracos-test -f diracos.yaml
Using Cached Shard Index for conda-forge/linux-64                                                   ✔ Done
Using Cached Shard Index for conda-forge/noarch                                                     ✔ Done
Fetching and Parsing Packages' Shards                                                     ✔ Done (0.1 sec)

Resolving Environment                                                                     ✔ Done (0.1 sec)
Using Cached Shard Index for conda-forge/linux-64                                                   ✔ Done
Using Cached Shard Index for conda-forge/noarch                                                     ✔ Done
Fetching and Parsing Packages' Shards                                                     ✔ Done (0.1 sec)

Resolving Environment                                                                     ✔ Done (0.1 sec)
error    libmamba Could not solve for environment specs
    The following package could not be installed
    └─ mysqlclient >=2.0.3,<2.1 * does not exist (perhaps a typo or a missing channel).
critical libmamba Could not solve for environment specs

with:

channels:
  - conda-forge
dependencies:
  - python=3.14
  - mysqlclient >=2.0.3,<2.1

and indeed the mysqlclient 2.0.3 is only available for <=3.11

[chrisburr]

We have a dirac grid channel which includes a build of the mysqlclient version that we need:

https://github.com/DIRACGrid/DIRACOS2/blob/main/construct.yaml#L7

That said, we might be able to relax the constraint now that @sfayer has worked on removing the need to use MySQL's escape function.

[maxnoe]

Nevermind, provided via the diracgrid channel.

However, I see these three merged pull requests: https://github.com/DIRACGrid/DIRAC/pulls?q=is%3Apr+escape_string+is%3Aclosed

So I wonder if the pin is still necessary?

Edit: saw your comment only after posting