docs(nix): clarify completed Nix prose

src/dotfiles/registry.nix

@@ -35,7 +35,8 @@ in
         type = lib.types.attrsOf (lib.types.attrsOf registry.type);
         default = { };
         description = ''
-          Lazily collected fleet-visible registry entries, nested by host and entry name.
+          Stores registry entries that the collector exposes to the fleet.
+          Nests entries by host and entry name.
         '';
       }
     ) definitions;

src/dotfiles/registry/schema.nix

@@ -5,14 +5,14 @@ let
       assertion = lib.mkOption {
         type = lib.types.functionTo lib.types.bool;
         description = ''
-          Predicate run against this registry's flattened collected entries.
+          Tests this registry's flattened collected entries.
         '';
       };
 
       message = lib.mkOption {
         type = lib.types.str;
         description = ''
-          Error message shown when this registry validation check fails.
+          Describes the registry validation failure.
         '';
       };
     };
@@ -23,7 +23,7 @@ in
     type = lib.mkOption {
       type = lib.types.raw;
       description = ''
-        NixOS option type for one registry entry.
+        Defines the NixOS option type for one registry entry.
       '';
     };
 
@@ -31,7 +31,7 @@ in
       type = lib.types.bool;
       default = false;
       description = ''
-        Whether collected entries are merged and published under every host key.
+        Replicates collected entries under every host key.
       '';
     };
 
@@ -39,7 +39,7 @@ in
       type = lib.types.listOf checkType;
       default = [ ];
       description = ''
-        Validation checks for this registry's flattened collected entries.
+        Contains validation checks for this registry's flattened collected entries.
       '';
     };
   };