NOJIRA-service-agents-me-put-partial-update

[pchero]

Fix PUT /service_agents/me (and the shared admin PUT /agents/{id}) partial-update semantics: name/detail/ring_method are now nil-means-unchanged, matching the platform-wide PUT convention (precedent 81a9a6b). Both endpoints converge on the same shared agent-basic-info update chain, so both are corrected by this single change.

• bin-openapi-manager: Remove required: block on service_agents/me.yaml PUT body; name/detail/ring_method become pointer types with omit-to-leave-unchanged descriptions (agents/id.yaml already had no required block)
• bin-agent-manager: agentHandler.UpdateBasicInfo/dbUpdateInfo (shared fix site) accept pointers, build a conditional field map, no-op short-circuits to AgentGet with zero DB writes and no update event; V1DataAgentsIDPut wire DTO fields become pointer+omitempty; listenhandler passes pointers through and nil-guards the name-length check
• bin-agent-manager: agent-control CLI update-basic-info gains viper.IsSet-gated flag-conditional construction (flags default to empty so unset flags leave fields unchanged)
• bin-common-handler: requesthandler.AgentV1AgentUpdate accepts pointers and marshals into the pointer wire DTO
• bin-api-manager: server PutServiceAgentsMe and PutAgentsId pass request pointers straight through instead of collapsing them to zero values; servicehandler AgentUpdate/ServiceAgentMeUpdate and the shared agentUpdate helper accept pointers
• bin-api-manager: docsdev agent_struct_agent.rst gains an Implementation Hint documenting the partial-update contract for both surfaces
• Tests: agenthandler UpdateBasicInfo/dbUpdateInfo table tests cover all-fields, name-only, ring_method-only, and true no-op (AgentUpdate Times(0)); requesthandler/servicehandler/server/listenhandler tests updated to pointer signatures with partial and nil-field cases; revert-and-rerun confirmed the pre-fix silent full-overwrite bug (FAIL before fix, PASS after)