(CAT-2609) Add context-gathering rules to CLAUDE.md

Updates the project rules to ensure the AI reads the entire repository and relevant files before suggesting or making any changes.

New rules suggested by Brónagh

Author: david22swan

CLAUDE.md

@@ -96,6 +96,8 @@ If you change template behavior, update:
 
 ## Project Rules
 
+- Always read through the entire repo at the start of a coding session before taking any action.
+- Always read the relevant files in the repo before suggesting or making a change.
 - Never merge a pull request.
 - Never work directly on the `main` or `master` branch.
 - Never push a branch without explicit instruction.