feat: serve docs flat at /<repo>/ with no redirects

- collect.py copies each repo's built site contents directly to a
  top-level <repo>/ dir (was libs|apis|wiki/<repo>/site nesting)
- nginx uses `index index.html lib/index.html api/index.html` so
  /dagpipe/ -> lib/index.html, /auth-server/ -> api/index.html are
  served internally with no redirects
- _index regenerates links against the flat layout
  (/dagpipe/lib/, /auth-server/api/, /mongo-ops/, /blog/...)
- config.yml static entries point at vendored blog/ + media-manager/
- Dockerfile copies per-repo dirs flat into the nginx html root
- removed stale libs/, apis/, wiki/, tutorials/ category trees

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

@@ -0,0 +1,37 @@
+{
+  "module": "mail_intake.exceptions",
+  "content": {
+    "path": "mail_intake.exceptions",
+    "docstring": "Exception hierarchy for Mail Intake.\n\n---\n\n## Summary\n\nThis module defines the **canonical exception types** used throughout the\nMail Intake library.\n\nAll library-raised errors derive from `MailIntakeError`. Consumers are\nencouraged to catch this base type (or specific subclasses) rather than\nprovider-specific or third-party exceptions.",
+    "objects": {
+      "MailIntakeError": {
+        "name": "MailIntakeError",
+        "kind": "class",
+        "path": "mail_intake.exceptions.MailIntakeError",
+        "signature": "<bound method Class.signature of Class('MailIntakeError', 17, 27)>",
+        "docstring": "Base exception for all Mail Intake errors.\n\nNotes:\n    **Guarantees:**\n\n        - This is the root of the Mail Intake exception hierarchy\n        - All errors raised by the library must derive from this class\n        - Consumers should generally catch this type when handling library-level failures"
+      },
+      "MailIntakeAuthError": {
+        "name": "MailIntakeAuthError",
+        "kind": "class",
+        "path": "mail_intake.exceptions.MailIntakeAuthError",
+        "signature": "<bound method Class.signature of Class('MailIntakeAuthError', 30, 39)>",
+        "docstring": "Authentication and credential-related failures.\n\nNotes:\n    **Lifecycle:**\n\n        - Raised when authentication providers are unable to acquire,\n          refresh, or persist valid credentials."
+      },
+      "MailIntakeAdapterError": {
+        "name": "MailIntakeAdapterError",
+        "kind": "class",
+        "path": "mail_intake.exceptions.MailIntakeAdapterError",
+        "signature": "<bound method Class.signature of Class('MailIntakeAdapterError', 42, 51)>",
+        "docstring": "Errors raised by mail provider adapters.\n\nNotes:\n    **Lifecycle:**\n\n        - Raised when a provider adapter encounters API errors, transport\n          failures, or invalid provider responses."
+      },
+      "MailIntakeParsingError": {
+        "name": "MailIntakeParsingError",
+        "kind": "class",
+        "path": "mail_intake.exceptions.MailIntakeParsingError",
+        "signature": "<bound method Class.signature of Class('MailIntakeParsingError', 54, 63)>",
+        "docstring": "Errors encountered while parsing message content.\n\nNotes:\n    **Lifecycle:**\n\n        - Raised when raw provider payloads cannot be interpreted or\n          normalized into internal domain models."
+      }
+    }
+  }
+}