[TON-365] Connection force disconnect

[g3co]

Force-close SSE connections after a configurable maximum lifetime to improve load balancing across bridge instances. Without this, clients stay pinned to a single backend indefinitely, causing uneven load distribution.

• Connections are closed after SSE_MAX_LIFETIME (default 2h) plus a random jitter of up to SSE_MAX_LIFETIME_JITTER (default 15min)
• Each connection gets its own independent jitter so they don't all drop at once
• Clients using EventSource auto-reconnect with Last-Event-ID, so no messages are lost

[github-actions]

📊 Performance Metrics

Performance Metrics (memory storage)

• CPU: 0.76s (4 cores) • Goroutines: 8 • Threads: 8
• Memory: 14.0MB heap • 47.8MB RAM • 38.5MB total • 240013 allocs
• GC: 11 cycles (0.75ms avg)
• FDs: 9/65536 (0.0%)

[github-actions]

📊 Performance Metrics

Performance Metrics (postgres storage)

• CPU: 0.91s (4 cores) • Goroutines: 10 • Threads: 9
• Memory: 19.5MB heap • 58.9MB RAM • 40.7MB total • 266861 allocs
• GC: 10 cycles (0.58ms avg)
• FDs: 35/65536 (0.1%)

[github-actions]

📊 Performance Metrics

Performance Metrics (cluster-valkey storage)

• CPU: 0.71s (4 cores) • Goroutines: 11 • Threads: 9
• Memory: 24.7MB heap • 56.4MB RAM • 37.3MB total • 300306 allocs
• GC: 9 cycles (0.82ms avg)
• FDs: 71/65536 (0.1%)

[github-actions]

📊 Performance Metrics

Performance Metrics (nginx storage)

• CPU: 0.11s (4 cores) • Goroutines: 6 • Threads: 5
• Memory: 1.2MB heap • 23.2MB RAM • 1.2MB total • 5902 allocs
• GC: 0 cycles (0ms avg)
• FDs: 15/65536 (0.0%)

[github-actions]

📊 Performance Metrics

Performance Metrics (dnsmasq storage)

• CPU: 0.27s (4 cores) • Goroutines: 11 • Threads: 8
• Memory: 6.3MB heap • 29.8MB RAM • 13.1MB total • 67973 allocs
• GC: 6 cycles (0.46ms avg)
• FDs: 60/65536 (0.1%)