fleet_* is now the documented tool name for all eleven MCP tools; each
bridge_* twin is registered against the exact same handler (no logic
duplication) and its description leads with a DEPRECATED notice. A
bridge_* call logs one WARN naming the old and new name, once per name
for the life of the process (a Set, not a numeric sentinel).
REPLY_CHARTER in HerdrPeerLauncher now tells a spawned member to call
fleet_reply — the one rule that must survive with no repo checkout.
All other bridge_* string literals across mcp/, Javadoc, and tests were
renamed to fleet_* for consistency with the new documented name.
Dai Ha