Remove application of settings to sqlite

docs/v3/develop/settings-ref.mdx

@@ -873,7 +873,8 @@ Number of seconds a runner should wait between heartbeats for flow runs.
 
 ---
 ## SQLAlchemySettings
-Settings for controlling SQLAlchemy behavior
+Settings for controlling SQLAlchemy behavior; note that these settings only take effect when
+using a PostgreSQL database.
 ### `pool_size`
 Controls connection pool size of database connection pools from the Prefect backend. If not set, the default SQLAlchemy pool size will be used.
 
@@ -1091,6 +1092,7 @@ The default limit applied to queries that can return multiple objects, such as `
 ## ServerDatabaseSettings
 Settings for controlling server database behavior
 ### `sqlalchemy`
+Settings for controlling SQLAlchemy behavior
 
 **Type**: [SQLAlchemySettings](#sqlalchemysettings)
 

schemas/settings.schema.json

@@ -740,7 +740,7 @@
             "type": "object"
         },
         "SQLAlchemySettings": {
-            "description": "Settings for controlling SQLAlchemy behavior",
+            "description": "Settings for controlling SQLAlchemy behavior; note that these settings only take effect when\nusing a PostgreSQL database.",
             "properties": {
                 "pool_size": {
                     "anyOf": [
@@ -923,6 +923,7 @@
             "properties": {
                 "sqlalchemy": {
                     "$ref": "#/$defs/SQLAlchemySettings",
+                    "description": "Settings for controlling SQLAlchemy behavior",
                     "supported_environment_variables": []
                 },
                 "connection_url": {

src/prefect/server/database/configurations.py

@@ -341,9 +341,7 @@ async def engine(self) -> AsyncEngine:
                 f"{sqlite3.sqlite_version}"
             )
 
-        kwargs: dict[
-            str, Any
-        ] = get_current_settings().server.database.sqlalchemy.model_dump(mode="json")
+        kwargs: dict[str, Any] = dict()
 
         loop = get_running_loop()
 
@@ -353,12 +351,6 @@ async def engine(self) -> AsyncEngine:
             if self.timeout is not None:
                 kwargs["connect_args"] = dict(timeout=self.timeout)
 
-            if self.sqlalchemy_pool_size is not None:
-                kwargs["pool_size"] = self.sqlalchemy_pool_size
-
-            if self.sqlalchemy_max_overflow is not None:
-                kwargs["max_overflow"] = self.sqlalchemy_max_overflow
-
             # use `named` paramstyle for sqlite instead of `qmark` in very rare
             # circumstances, we've seen aiosqlite pass parameters in the wrong
             # order; by using named parameters we avoid this issue

src/prefect/settings/models/server/database.py

@@ -17,7 +17,8 @@
 
 class SQLAlchemySettings(PrefectBaseSettings):
     """
-    Settings for controlling SQLAlchemy behavior
+    Settings for controlling SQLAlchemy behavior; note that these settings only take effect when
+    using a PostgreSQL database.
     """
 
     model_config: ClassVar[ConfigDict] = _build_settings_config(