Rename Go module paths to repo.anhonesthost.net/CyberCoveLLC/threshold

Rename root, api and sdk module paths (imports, go.mod, go_package,
ldflags, build scripts, buf configs) and regenerate protobuf/gateway
code with the project's pinned toolchain. Wire identifiers unchanged.
api gets a local replace for sdk; root/api/sdk require v0.1.0.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

internal/proto/controller/api/resources/plugins/v1/plugin.proto

@@ -5,7 +5,7 @@ syntax = "proto3";
 
 package controller.api.resources.plugins.v1;
 
-option go_package = "github.com/hashicorp/boundary/sdk/pbs/controller/api/resources/plugins;plugins";
+option go_package = "repo.anhonesthost.net/CyberCoveLLC/threshold/sdk/pbs/controller/api/resources/plugins;plugins";
 
 message PluginInfo {
   // Output only. The ID of the Plugin.