Support for AGE connections with a user who is not a superuser.

src/age_plotter/services/age_client.py

@@ -19,10 +19,10 @@ async def connect(self) -> None:
             port=self.config.port,
             dbname=self.config.database,
             user=self.config.username,
-            password=self.config.password,
+            password=self.config.password
         )
         # Load AGE extension
-        await self.conn.execute("LOAD 'age';")
+        await self.conn.execute("LOAD '$libdir/plugins/age.so';")
         await self.conn.execute("SET search_path = ag_catalog, '$user', public;")
 
     async def test_connection(self) -> bool:

src/age_plotter/services/query_executor.py

@@ -414,7 +414,7 @@ async def _execute_age(
 
     try:
         # Load AGE extension
-        await conn.execute(sql.SQL("LOAD 'age'"))
+        await conn.execute(sql.SQL("LOAD '$libdir/plugins/age.so'"))
         await conn.execute(sql.SQL("SET search_path = ag_catalog, '$user', public"))
 
         # Get backend PID for cancellation

src/age_plotter/services/schema_introspector.py

@@ -56,7 +56,7 @@ async def introspect_age(config: AgeConnection) -> GraphSchema:
         password=config.password,
     )
     try:
-        await conn.execute("LOAD 'age';")
+        await conn.execute("LOAD '$libdir/plugins/age.so';")
         await conn.execute("SET search_path = ag_catalog, '$user', public;")
 
         # Get graph OID