chore(coderabbit): scope bot reviews to shipped code

Exclude docs/** and tasks/** from CodeRabbit path filters: prose and
working notes don't need bot review (no docs CI gate exists), and the
mythos-enhancements PR's 152 changed files exceeded the 150-file
per-review limit, skipping the review entirely.

Author: elkaix

.coderabbit.yaml

@@ -51,6 +51,10 @@ reviews:
     - "!graphify-out/**"
     - "!**/*.pyc"
     - "!**/__pycache__/**"
+    # Prose and working-notes paths: keeps bot reviews focused on shipped
+    # code and large branches under the per-PR reviewed-file limit.
+    - "!docs/**"
+    - "!tasks/**"
 
   path_instructions:
     - path: "**/*.py"