fix: exempt configuration blocks from length lint

.rubocop.yml

@@ -7,3 +7,8 @@ Style/StringLiterals:
 
 Style/StringLiteralsInInterpolation:
   EnforcedStyle: double_quotes
+
+Metrics/BlockLength:
+  AllowedMethods:
+    - refine
+    - Vamp.configure

docs/configuration.md

@@ -423,7 +423,7 @@ Install Solargraph yourself with `gem install solargraph` in the project's Ruby
 
 Install [Tinymist](https://github.com/Myriad-Dreamin/tinymist#installation) separately and enable `config.lsp["typst"] = true` for `.typ` files. The preset launches `["tinymist", "lsp"]` with language ID `typst`; it does not enable preview or add export settings. Tinymist builds that return overlapping semantic tokens despite Vamp advertising no overlap support retain Tree-sitter highlighting and report the rejected tokens; hover and other LSP requests remain available. This occurs with the installed Typst 0.14.2-based build (`tinymist/v0.14.6-rc2`).
 
-**Config-file lint style:** Solargraph's RuboCop reporter discovers `.rubocop.yml` from the Ruby file's directory, not Vamp's workspace. A config under `~/.config/vamp/` therefore does not inherit this repository's policy. To keep double quotes, multiline trailing argument commas, commented-out settings without a space after `#`, and no required frozen-string header, place this `.rubocop.yml` beside `config.rb` (also for a custom `--config` path):
+**Config-file lint style:** Solargraph's RuboCop reporter discovers `.rubocop.yml` from the Ruby file's directory, not Vamp's workspace. A config under `~/.config/vamp/` therefore does not inherit this repository's policy. To keep double quotes, multiline trailing argument commas, commented-out settings without a space after `#`, no required frozen-string header, and no block-length limit on `Vamp.configure`, place this `.rubocop.yml` beside `config.rb` (also for a custom `--config` path):
 
 ```yaml
 Style/StringLiterals:
@@ -437,9 +437,14 @@ Style/FrozenStringLiteralComment:
 
 Layout/LeadingCommentSpace:
   Enabled: false
+
+Metrics/BlockLength:
+  AllowedMethods:
+    - refine
+    - Vamp.configure
 ```
 
-Syntax errors and other lint checks remain enabled. Restart Vamp after changing the policy so Solargraph reloads it; the Ruby config itself need not change.
+Syntax errors and other lint checks remain enabled. The block-length exemption applies only to `Vamp.configure`, alongside RuboCop's default `refine` exemption; ordinary blocks still have the normal limit. Restart Vamp after changing the policy so Solargraph reloads it; the Ruby config itself need not change.
 
 **Python (Astral):** install [ty](https://docs.astral.sh/ty/editors/) and [Ruff](https://docs.astral.sh/ruff/editors/setup/) yourself, for example with `uv tool install ty` and `uv tool install ruff`. The Python preset sends the same documents to both servers, uses ty for hover/definition, and merges type errors with Ruff lint diagnostics. Clearing or losing one server preserves the other's diagnostics. Formatting and code actions remain unsupported by Vamp.