chore(brand): rename the product to ReplyPier

The upstream project name is gone from code, assets, docs and build
output: brand strings, domains (replypier.site and its app/api/docs/help
subdomains), env prefixes, image and network names, the widget's public
JS API (window.ReplyPier, replypierId/BaseUrl/Config/Token), CSS tokens
(--rp-*), file and directory names, and the WordPress plugin package.

- widget loader is now webclient/replypier.min.js; both bundles rebuilt
  from source (backend/assets/widget.{js,css}, frontend/public/webclient)
- NOTICE, llms.txt, CONTRIBUTING, HELP_CENTER_INFRA and config.dev.js
  rewritten rather than string-swapped; the demo config no longer ships
  the previous vendor's Firebase/Razorpay/Google keys
- new migration replypier_ai_model_001 adds REPLYPIER to the managed
  AIModelType and rewrites pre-rename rows
- local compose project, database, role and volume renamed; LOCAL_DEPLOY
  documents carrying the old local data over

backend/app/utils/agno_patches.py

@@ -1,5 +1,5 @@
 """
-Copyright 2024-2026 ChatterMate
+Copyright 2024-2026 ReplyPier
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -50,7 +50,7 @@ from app.utils.agno_eval_guard import install_eval_guard
 
 logger = get_logger(__name__)
 
-_PATCHED_FLAG = "_chattermate_answers_at_limit"
+_PATCHED_FLAG = "_replypier_answers_at_limit"
 
 # Set on the Model instance once this run has spent its tool budget. Safe as
 # instance state: create_model() builds a fresh Model per ChatAgent and ChatAgent
@@ -61,7 +61,7 @@ _PATCHED_FLAG = "_chattermate_answers_at_limit"
 # single round. That is fine — setting it twice is a no-op. It mattered only while
 # there was a backstop that had to tell a parallel sibling apart from a genuine
 # repeat; without one, a plain flag is enough.
-_EXHAUSTED = "_chattermate_tools_exhausted"
+_EXHAUSTED = "_replypier_tools_exhausted"
 
 # Groq's structured output arrives as a tool call of this name rather than as
 # text. Kept in step with app.agents.structured_output.build_groq_json_tool.