Fix pgboucnerconfig

[boddumanohar]

Fixes: simplyblock/vela#315
PGBouncer configuration is stored at "{vmi_name}-config" and is present in pgbouncer.ini file of the same configmap.

"level": "INFO", "logger": "uvicorn.access", "message": "10.244.5.195:34246 - \"PATCH /organizations/01KP2P7J4VXA6ENZT7MWEXTS62/projects/01KP2P7W7WVHD22DKTFYPZDQBH/branches/01KP2P8HK4CTR0XS21JK14560X/pgbouncer-config HTTP/1.1\" 200"}

testing

have updated default pool size from UI

the API request was successfully

{"timestamp": "2026-04-13T05:53:33+0000", "level": "INFO", "logger": "uvicorn.access", "message": "10.244.5.195:34246 - \"PATCH /organizations/01KP2P7J4VXA6ENZT7MWEXTS62/projects/01KP2P7W7WVHD22DKTFYPZDQBH/branches/01KP2P8HK4CTR0XS21JK14560X/pgbouncer-config HTTP/1.1\" 200"}

and the configmap is also updated successfully.

    default_pool_size = 40

and the the response of https:///api/platform/organizations//projects//branches//pgbouncer

also shows the updated value

{
    "pgbouncer_enabled": true,
    "pool_mode": "transaction",
    "max_client_conn": 100,
    "default_pool_size": 40,
    "server_idle_timeout": 60,
    "server_lifetime": 600,
    "query_wait_timeout": 30,
    "reserve_pool_size": 0
}

additional notes

Tests failures are not related to the fix in this PR

tests/branches/test_start_stop.py::test_branch_stop FAILED               [ 97%]
tests/branches/test_start_stop.py::test_branch_start FAILED              [100%]

[mxsrc]

Two more things, two of the Tests fail, it shouldnt be related but you never know. Also, could you introduce a test that would have uncovered this fault earlier?