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/values.yaml

@@ -1,7 +1,7 @@
 replicaCount: 1
 
 image:
-  repository: 1467078763/metapi
+  repository: 1467078763/boosapi
   tag: latest
   digest: ""
   pullPolicy: Always
@@ -17,7 +17,7 @@ deployment:
     maxUnavailable: 0
 
 persistence:
-  hostPath: /opt/1panel/docker/compose/metapihub/data
+  hostPath: /opt/1panel/docker/compose/boosapihub/data
 
 env:
   authToken: ""