* refactor(mcp): register service-backed tools through one contract binding loop
registerContractTools registers every bound contract from the registry through the shared Evidence or retained-summary handler its binding selects, and refuses a binding that names no registered contract. createServer declares the bindings by exact contract name; 41 per-tool register files are deleted.
* refactor(mcp): bind service-backed tools from one shared table and make each binding select one handler
serviceToolBindings owns the binding of every service-backed contract, keyed by its service; createServer and the MCP tests bind from it, so tests exercise the production handler kind, admission and dependencies. A binding can no longer carry both run and summary. The Go real-binary workflow follows the new registration owners.
* test(mcp): assert binding exclusivity with type-level checks that hold under every checker
morluto
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