feat: collect py-jwt wiki; register wiki kind; refresh lib and mcp artifacts

Adds the py-jwt wiki to the hub alongside lib and mcp and picks up
the regenerated flat lib reference and standardized MCP modules.

mcp/py-jwt/modules/jwtlib.models.common.json

@@ -4,32 +4,11 @@
     "path": "jwtlib.models.common",
     "docstring": "# Summary\n\nCommon Pydantic mixins for authentication models.\n\nThis module provides reusable mixins for identity, password, and\naccount state. These mixes ensure consistency across internal\npersistence models and public-facing projection models.",
     "objects": {
-      "BaseModel": {
-        "name": "BaseModel",
-        "kind": "alias",
-        "path": "jwtlib.models.common.BaseModel",
-        "signature": "<bound method Alias.signature of Alias('BaseModel', 'pydantic.BaseModel')>",
-        "docstring": null
-      },
-      "EmailStr": {
-        "name": "EmailStr",
-        "kind": "alias",
-        "path": "jwtlib.models.common.EmailStr",
-        "signature": "<bound method Alias.signature of Alias('EmailStr', 'pydantic.EmailStr')>",
-        "docstring": null
-      },
-      "Field": {
-        "name": "Field",
-        "kind": "alias",
-        "path": "jwtlib.models.common.Field",
-        "signature": "<bound method Alias.signature of Alias('Field', 'pydantic.Field')>",
-        "docstring": null
-      },
       "IdentityMixin": {
         "name": "IdentityMixin",
         "kind": "class",
         "path": "jwtlib.models.common.IdentityMixin",
-        "signature": "<bound method Class.signature of Class('IdentityMixin', 14, 37)>",
+        "signature": null,
         "docstring": "Mixin for entities with a username and email.\n\nAttributes:\n    username (str):\n        Unique username used for authentication and display.\n    email (Optional[EmailStr]):\n        Primary email address associated with the account.",
         "members": {
           "username": {
@@ -52,7 +31,7 @@
         "name": "PasswordMixin",
         "kind": "class",
         "path": "jwtlib.models.common.PasswordMixin",
-        "signature": "<bound method Class.signature of Class('PasswordMixin', 40, 54)>",
+        "signature": null,
         "docstring": "Mixin for entities with a raw password field.\n\nAttributes:\n    password (str):\n        User password (minimum 6 characters).",
         "members": {
           "password": {
@@ -68,7 +47,7 @@
         "name": "ActiveStateMixin",
         "kind": "class",
         "path": "jwtlib.models.common.ActiveStateMixin",
-        "signature": "<bound method Class.signature of Class('ActiveStateMixin', 57, 71)>",
+        "signature": null,
         "docstring": "Mixin for entities with an active status flag.\n\nAttributes:\n    is_active (bool):\n        Indicates whether the account is active and allowed to\n        authenticate.",
         "members": {
           "is_active": {