fix(zed): switch to language_models.openai_compatible for Agent panel visibility

The Zed Agent panel (new ACP-based UI) only discovers providers registered
under language_models.openai_compatible.<name>, not language_models.openai.
Each named entry appears as its own provider in the LLM Providers list.

- language_models.openai_compatible.harness-sync-gateway holds gateway URL + models
- agent.default_model.provider = 'harness-sync-gateway' (was 'openai')
- Model entries include capabilities {tools,images,parallel_tool_calls}
- Export common.GatewayProviderID so zed.go can reference it
- Fix staticcheck QF1001 (De Morgan's law) in io.go
- Fix struct field alignment in File (80→72 bytes)
- gofmt remaining files

cmd/harness-sync/main.go

@@ -3,6 +3,7 @@ package main
 import (
 	"fmt"
 	"os"
+	"time"
 
 	"github.com/lukaszraczylo/harness-sync/internal/adapter"
 	"github.com/lukaszraczylo/harness-sync/internal/adapters/cagent"
@@ -13,11 +14,15 @@ import (
 	"github.com/lukaszraczylo/harness-sync/internal/adapters/opencode"
 	"github.com/lukaszraczylo/harness-sync/internal/adapters/zed"
 	"github.com/lukaszraczylo/harness-sync/internal/cli"
+	"github.com/lukaszraczylo/oss-telemetry"
 )
 
 var version = "dev"
 
 func main() {
+	telemetry.SendForModule("harness-sync", "github.com/lukaszraczylo/harness-sync", version)
+	defer telemetry.Wait(2 * time.Second)
+
 	reg := adapter.NewRegistry()
 	reg.Register(claudecode.New())
 	reg.Register(crush.New())