[MISC] Only update tls flags on the Juju leader unit

[dragomirp]

Issue

Trying to update tls flags in the client relation data from follower unit causes warnings:

2024-11-14T03:01:16.3917364Z unit-postgresql-k8s-2: 03:00:51 ERROR unit.postgresql-k8s/2.juju-log This operation (update_relation_data()) can only be performed by the leader unit
2024-11-14T03:01:16.3935892Z unit-postgresql-k8s-2: 03:00:51 ERROR unit.postgresql-k8s/2.juju-log This operation (update_relation_data()) can only be performed by the leader unit

Solution

Check leadership before setting the relation data

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 75.46%. Comparing base (2a7f044) to head (12226b5).
Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
src/relations/postgresql_provider.py	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #770      +/-   ##
==========================================
- Coverage   75.60%   75.46%   -0.15%     
==========================================
  Files          12       12              
  Lines        3116     3118       +2     
  Branches      475      476       +1     
==========================================
- Hits         2356     2353       -3     
- Misses        617      622       +5     
  Partials      143      143              

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[taurus-forever]

@dragomirp Thank you for the housekeeping reaction to the warnings!