feat: adding postgres application name

Author: benfdking

docs/integrations/engines/postgres.md

@@ -10,18 +10,19 @@ pip install "sqlmesh[postgres]"
 
 ### Connection options
 
-| Option            | Description                                                                     | Type   | Required |
-|-------------------|---------------------------------------------------------------------------------|:------:|:--------:|
-| `type`            | Engine type name - must be `postgres`                                           | string | Y        |
-| `host`            | The hostname of the Postgres server                                             | string | Y        |
-| `user`            | The username to use for authentication with the Postgres server                 | string | Y        |
-| `password`        | The password to use for authentication with the Postgres server                 | string | Y        |
-| `port`            | The port number of the Postgres server                                          | int    | Y        |
-| `database`        | The name of the database instance to connect to                                 | string | Y        |
-| `keepalives_idle` | The number of seconds between each keepalive packet sent to the server.         | int    | N        |
-| `connect_timeout` | The number of seconds to wait for the connection to the server. (Default: `10`) | int    | N        |
-| `role`            | The role to use for authentication with the Postgres server                     | string | N        |
-| `sslmode`         | The security of the connection to the Postgres server                           | string | N        |
+| Option             | Description                                                                     | Type   | Required |
+|--------------------|---------------------------------------------------------------------------------|:------:|:--------:|
+| `type`             | Engine type name - must be `postgres`                                           | string | Y        |
+| `host`             | The hostname of the Postgres server                                             | string | Y        |
+| `user`             | The username to use for authentication with the Postgres server                 | string | Y        |
+| `password`         | The password to use for authentication with the Postgres server                 | string | Y        |
+| `port`             | The port number of the Postgres server                                          | int    | Y        |
+| `database`         | The name of the database instance to connect to                                 | string | Y        |
+| `keepalives_idle`  | The number of seconds between each keepalive packet sent to the server.         | int    | N        |
+| `connect_timeout`  | The number of seconds to wait for the connection to the server. (Default: `10`) | int    | N        |
+| `role`             | The role to use for authentication with the Postgres server                     | string | N        |
+| `sslmode`          | The security of the connection to the Postgres server                           | string | N        |
+| `application_name` | The name of the application to use for the connection                           | string | N        |
 
 ## Airflow Scheduler
 **Engine Name:** `postgres`

sqlmesh/core/config/connection.py

@@ -1196,6 +1196,7 @@ class PostgresConnectionConfig(ConnectionConfig):
     connect_timeout: int = 10
     role: t.Optional[str] = None
     sslmode: t.Optional[str] = None
+    application_name: t.Optional[str] = None
 
     concurrent_tasks: int = 4
     register_comments: bool = True
@@ -1214,6 +1215,7 @@ def _connection_kwargs_keys(self) -> t.Set[str]:
             "keepalives_idle",
             "connect_timeout",
             "sslmode",
+            "application_name",
         }
 
     @property