fix: vendor per-kind sites in the hub; drop stale blog docs

- collect.py: when a kind points at the shared site root, copy only the
  per-kind subdir (site/lib -> <repo>/lib) instead of the whole site, so
  stray single-site build output never leaks into the hub
- Purge stale collected artifacts (404.html, assets/, search/, sitemaps,
  objects.inv, duplicate mcp/) from every repo dir, matching the cleaned
  source site/ roots
- Refresh collected output from source repos, incl. the khata-app app
- Remove the vendored Blog API docs (config.yml entry + blog/) and its card

mail-intake/mcp/modules/mail_intake.config.json

@@ -1,60 +0,0 @@
-{
-  "module": "mail_intake.config",
-  "content": {
-    "path": "mail_intake.config",
-    "docstring": "# Summary\n\nGlobal configuration models for Mail Intake.\n\nThis module defines the **top-level configuration object** used to control\nmail ingestion behavior across adapters, authentication providers, and\ningestion workflows.\n\nConfiguration is intentionally explicit, immutable, and free of implicit\nenvironment reads to ensure predictability and testability.",
-    "objects": {
-      "dataclass": {
-        "name": "dataclass",
-        "kind": "alias",
-        "path": "mail_intake.config.dataclass",
-        "signature": "<bound method Alias.signature of Alias('dataclass', 'dataclasses.dataclass')>",
-        "docstring": null
-      },
-      "MailIntakeConfig": {
-        "name": "MailIntakeConfig",
-        "kind": "class",
-        "path": "mail_intake.config.MailIntakeConfig",
-        "signature": "<bound method Class.signature of Class('MailIntakeConfig', 17, 56)>",
-        "docstring": "Global configuration for `mail-intake`.\n\nNotes:\n    **Guarantees:**\n\n        - This configuration is intentionally explicit and immutable.\n        - No implicit environment reads or global state.\n        - Explicit configuration over implicit defaults.\n        - No direct environment or filesystem access.\n        - This model is safe to pass across layers and suitable for\n          serialization.",
-        "members": {
-          "provider": {
-            "name": "provider",
-            "kind": "attribute",
-            "path": "mail_intake.config.MailIntakeConfig.provider",
-            "signature": null,
-            "docstring": "Identifier of the mail provider to use (e.g., ``\"gmail\"``)."
-          },
-          "user_id": {
-            "name": "user_id",
-            "kind": "attribute",
-            "path": "mail_intake.config.MailIntakeConfig.user_id",
-            "signature": null,
-            "docstring": "Provider-specific user identifier. Defaults to the authenticated user."
-          },
-          "readonly": {
-            "name": "readonly",
-            "kind": "attribute",
-            "path": "mail_intake.config.MailIntakeConfig.readonly",
-            "signature": null,
-            "docstring": "Whether ingestion should operate in read-only mode."
-          },
-          "credentials_path": {
-            "name": "credentials_path",
-            "kind": "attribute",
-            "path": "mail_intake.config.MailIntakeConfig.credentials_path",
-            "signature": null,
-            "docstring": "Optional path to provider credentials configuration."
-          },
-          "token_path": {
-            "name": "token_path",
-            "kind": "attribute",
-            "path": "mail_intake.config.MailIntakeConfig.token_path",
-            "signature": null,
-            "docstring": "Optional path to persisted authentication tokens."
-          }
-        }
-      }
-    }
-  }
-}