feat: proxmox idlewatcher (#88)

* feat: idle sleep for proxmox LXCs

* refactor: replace deprecated docker api types

* chore(api): remove debug task list endpoint

* refactor: move servemux to gphttp/servemux; favicon.go to v1/favicon

* refactor: introduce Pool interface, move agent_pool to agent module

* refactor: simplify api code

* feat: introduce debug api

* refactor: remove net.URL and net.CIDR types, improved unmarshal handling

* chore: update Makefile for debug build tag, update README

* chore: add gperr.Unwrap method

* feat: relative time and duration formatting

* chore: add ROOT_DIR environment variable, refactor

* migration: move homepage override and icon cache to $BASE_DIR/data, add migration code

* fix: nil dereference on marshalling service health

* fix: wait for route deletion

* chore: enhance tasks debuggability

* feat: stdout access logger and MultiWriter

* fix(agent): remove agent properly on verify error

* fix(metrics): disk exclusion logic and added corresponding tests

* chore: update schema and prettify, fix package.json and Makefile

* fix: I/O buffer not being shrunk before putting back to pool

* feat: enhanced error handling module

* chore: deps upgrade

* feat: better value formatting and handling

---------

Co-authored-by: yusing <yusing@6uo.me>

internal/idlewatcher/debug.go

@@ -0,0 +1,40 @@
+package idlewatcher
+
+import (
+	"iter"
+	"strconv"
+
+	"github.com/yusing/go-proxy/internal/utils/strutils"
+)
+
+type watcherDebug struct {
+	*Watcher
+}
+
+func (w watcherDebug) MarshalMap() map[string]any {
+	state := w.state.Load()
+	return map[string]any{
+		"name": w.Name(),
+		"state": map[string]string{
+			"status": string(state.status),
+			"ready":  strconv.FormatBool(state.ready),
+			"err":    fmtErr(state.err),
+		},
+		"expires":    strutils.FormatTime(w.expires()),
+		"last_reset": strutils.FormatTime(w.lastReset.Load()),
+		"config":     w.cfg,
+	}
+}
+
+func Watchers() iter.Seq2[string, watcherDebug] {
+	return func(yield func(string, watcherDebug) bool) {
+		watcherMapMu.RLock()
+		defer watcherMapMu.RUnlock()
+
+		for k, w := range watcherMap {
+			if !yield(k, watcherDebug{w}) {
+				return
+			}
+		}
+	}
+}