feat: implement Remote WinBox worker, API, frontend integration, OpenBao persistence, and supporting docs

winbox-worker/internal/session/pool.go

@@ -0,0 +1,60 @@
+package session
+
+import (
+	"fmt"
+	"sync"
+)
+
+type Pool struct {
+	mu        sync.Mutex
+	available []int
+	inUse     map[int]bool
+}
+
+func NewPool(min, max int) *Pool {
+	available := make([]int, 0, max-min+1)
+	for i := min; i <= max; i++ {
+		available = append(available, i)
+	}
+	return &Pool{
+		available: available,
+		inUse:     make(map[int]bool),
+	}
+}
+
+func (p *Pool) Allocate() (int, error) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	if len(p.available) == 0 {
+		return 0, fmt.Errorf("pool exhausted")
+	}
+	id := p.available[0]
+	p.available = p.available[1:]
+	p.inUse[id] = true
+	return id, nil
+}
+
+func (p *Pool) Release(id int) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	if !p.inUse[id] {
+		return
+	}
+	delete(p.inUse, id)
+	p.available = append(p.available, id)
+}
+
+func (p *Pool) Available() int {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	return len(p.available)
+}
+
+func (p *Pool) ResetAll() {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	for id := range p.inUse {
+		p.available = append(p.available, id)
+	}
+	p.inUse = make(map[int]bool)
+}