chore: Hanzo branding + LICENSE attribution (#8)

* docs: tidy LLM.md indexes; CLAUDE.md -> LLM.md symlink convention

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* chore(license): add Portions Copyright Hanzo AI Inc (preserve SigNoz MIT notice)

---------

Co-authored-by: Antje Worring <worringantje@gmail.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Co-authored-by: hanzo-dev <dev@hanzo.ai>

LICENSE

@@ -1,5 +1,7 @@
 Copyright (c) 2020-present SigNoz Inc.
 
+Portions Copyright (c) 2026 Hanzo AI Inc.
+
 Portions of this software are licensed as follows:
 
 * All content that resides under the "ee/" and the "cmd/enterprise/" directory of this repository, if that directory exists, is licensed under the license defined in "ee/LICENSE".

LLM.md

@@ -1,4 +1,4 @@
-# o11y — AI Assistant Context
+# o11y
 
 <h1 align="center" style="border-bottom: none">
     <a href="https://o11y.hanzo.ai" target="_blank">