Full internal rename: metapi → boosapi

Rename all remaining internal protocol identifiers:
- x-metapi-* headers → x-boosapi-*
- metapi: reasoning prefix → boosapi:
- __metapi* runtime markers → __boosapi*
- file-metapi-* → file-boosapi-*
- METAPI_* env vars → BOOSAPI_*
- metapi_turn_state/metapi_mcp_item__ etc. → boosapi_*
- package.json name → boosapi
- Docker/deploy/k3s/docs references

46 files changed, 168 insertions, 170 deletions.
typecheck:web passes (0 new errors).

Signed-off-by: Boos4721 <boos4721@icloud.com>

deploy/k3s/chart/templates/service.yaml

@@ -1,13 +1,13 @@
 apiVersion: v1
 kind: Service
 metadata:
-  name: {{ include "metapi.fullname" . }}
+  name: {{ include "boosapi.fullname" . }}
   labels:
-    {{- include "metapi.labels" . | nindent 4 }}
+    {{- include "boosapi.labels" . | nindent 4 }}
 spec:
   type: {{ .Values.service.type }}
   selector:
-    app.kubernetes.io/name: {{ include "metapi.name" . }}
+    app.kubernetes.io/name: {{ include "boosapi.name" . }}
     app.kubernetes.io/instance: {{ .Release.Name }}
   ports:
     - name: http