* feat(plugins): catch code-mode drift between catalogs sharing one model
Adds a contract test that groups bundled catalog rows by shared upstream
model and requires every row in a group to declare compat.codeMode once any
sibling does. Rows sharing a model id group automatically; rows under
different ids opt in with the new manifest-only `upstreamModel` marker.
Moves the kimi catalog into its manifest so the scan can see it, and records
the tier reseller catalogs were silently missing as explicit "capable".
* docs: regenerate docs map for the shared-model code-mode section
The moonshot provider already declares compat.codeMode: "preferred" for the
same model (kimi-k3), so tools.codeMode: "auto" engaged code mode on the API
surface but silently skipped the Kimi Code subscription surface (kimi/k3,
kimi/k3-256k). Live proof on kimi/k3: "auto" reported codeModeEngaged=false
while true reported codeModeEngaged=true with "code-mode: cataloged 50 tools
behind exec/wait" and 2 bridge tool calls.
K2.7 (kimi-for-coding*) stays unflagged, matching moonshot's kimi-k2.7-code.
Peter Steinberger