chore: update lint config for golangci-lint v2.11 compat

Author: m0n0x41d

src/mcp/.golangci.yml

@@ -32,13 +32,18 @@ linters:
       excludes:
         - G301 # directory permissions 0755 — fine for user-facing dirs
         - G302 # file permissions 0644 — fine for user-facing files
+        - G204 # subprocess with variable — we call quint/git as subprocess intentionally
         - G304 # file inclusion via variable — we read user-specified paths intentionally
         - G306 # WriteFile permissions 0644 — fine for markdown/config files
+        - G703 # path traversal — we construct paths from project root intentionally
   exclusions:
     rules:
       - linters:
           - staticcheck
         text: "QF1003"
+      - linters:
+          - staticcheck
+        text: "QF1012"
       - linters:
           - errcheck
         source: "defer .*(Close|Rollback)\\(\\)"