Drop the Comp AI CRM acknowledgement

Nothing in PIG derives from that repository. The fact model, the leased
agent task queue and the `agentBrief` field are our own designs, and MIT's
attribution condition reaches copied source, not ideas — so the credit was
a courtesy that misstated where this code came from.

The one line worth keeping was never a credit: AGENTS.md's rule against
lifting component files out of somebody else's repo. It is restated
generically, and the shadcn-from-upstream guidance stays.

Buzz keeps its NOTICE entry.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

NOTICE

@@ -19,14 +19,9 @@ limitations under the License.
 
 ACKNOWLEDGEMENTS
 
-Several architectural ideas in this project were studied from, and are
-gratefully credited to, the following open-source projects. No source code
-was copied from them; the debt is one of design.
-
-  Comp AI CRM (https://github.com/trycompai/crm) — MIT License.
-  The evidence-banded fact model, the leased database-backed agent task
-  queue, the agent-brief pattern on user-defined fields, and the
-  "intelligence never lives in the API" separation.
+One architectural idea in this project was studied from, and is gratefully
+credited to, the following open-source project. No source code was copied
+from it; the debt is one of design.
 
   Buzz (https://github.com/block/buzz) — Apache License 2.0.
   The agent-as-workspace-member model that informed PIG's treatment of