Update Python dependencies (#130)

* Update Python dependencies

* Fix linting

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Dragomir Penev <dragomir.penev@canonical.com>

Author: renovate[bot]

pyproject.toml

@@ -4,7 +4,7 @@
 [project]
 name = "postgresql-charms-single-kernel"
 description = "Shared and reusable code for PostgreSQL-related charms"
-version = "16.2.1"
+version = "16.2.2"
 readme = "README.md"
 license = {file = "LICENSE"}
 authors = [
@@ -35,11 +35,11 @@ module-root = ""
 
 [dependency-groups]
 format = [
-    "ruff==0.15.13"
+    "ruff==0.15.14"
 ]
 lint = [
     "codespell==2.4.2",
-    "ty==0.0.37"
+    "ty==0.0.39"
 ]
 unit = [
     "coverage[toml]==7.14.0",

single_kernel_postgresql/utils/postgresql.py

@@ -1381,14 +1381,14 @@ def build_postgresql_parameters(
             parameters[parameter] = value
         shared_buffers_max_value_in_mb = int(available_memory * 0.4 / 10**6)
         shared_buffers_max_value = int(shared_buffers_max_value_in_mb * 10**3 / 8)
-        if parameters.get("shared_buffers", 0) > shared_buffers_max_value:
+        if int(parameters.get("shared_buffers", 0)) > shared_buffers_max_value:
             raise Exception(
                 f"Shared buffers config option should be at most 40% of the available memory, which is {shared_buffers_max_value_in_mb}MB"
             )
         if profile == "production":
             if "shared_buffers" in parameters:
                 # Convert to bytes to use in the calculation.
-                shared_buffers = parameters["shared_buffers"] * 8 * 10**3
+                shared_buffers = int(parameters["shared_buffers"]) * 8 * 10**3
             else:
                 # Use 25% of the available memory for shared_buffers.
                 # and the remaining as cache memory.