update pg-cron metadata

updated to post-#149/#154 metadata format: nested version objects with
package+sql versions, set cron.database_name so CREATE EXTENSION works
during E2E tests, enables create_extension

Author: ardentperf

pg-cron/README.md

@@ -59,6 +59,8 @@ spec:
     name: cluster-pg-cron
   extensions:
   - name: pg_cron
+    # renovate: suite=trixie-pgdg depName=postgresql-18-cron extractVersion=^(?<version>\d+\.\d+)
+    version: '1.6'
 ```
 
 ### 3. Verify installation

pg-cron/metadata.hcl

@@ -8,22 +8,33 @@ metadata = {
 
   sql_name                 = "pg_cron"
   shared_preload_libraries = ["pg_cron"]
+  # cron.database_name must match the database where CREATE EXTENSION is run
+  postgresql_parameters    = { "cron.database_name" = "app" }
   extension_control_path   = []
   dynamic_library_path     = []
   ld_library_path          = []
   bin_path                 = []
+  env                      = {}
   auto_update_os_libs      = false
   required_extensions      = []
-  create_extension         = false
+  create_extension         = true
 
   versions = {
-    trixie = {
-        // renovate: suite=trixie-pgdg depName=postgresql-18-cron
-        "18" = "1.6.7-2.pgdg13+1"
-    }
     bookworm = {
+      "18" = {
         // renovate: suite=bookworm-pgdg depName=postgresql-18-cron
-        "18" = "1.6.7-2.pgdg12+1"
+        package = "1.6.7-2.pgdg12+1"
+        // renovate: suite=bookworm-pgdg depName=postgresql-18-cron extractVersion=^(?<version>\d+\.\d+)
+        sql     = "1.6"
+      }
+    }
+    trixie = {
+      "18" = {
+        // renovate: suite=trixie-pgdg depName=postgresql-18-cron
+        package = "1.6.7-2.pgdg13+1"
+        // renovate: suite=trixie-pgdg depName=postgresql-18-cron extractVersion=^(?<version>\d+\.\d+)
+        sql     = "1.6"
+      }
     }
   }
 }