- Add proper CloseWrite handling to signal EOF to other goroutine
- Ensure both copy goroutines terminate when either side closes
- Prevent goroutine leaks for SSH forwarded-tcpip channels:
- Use select with default when sending result to resultChan
- Close unused SSH channels and discard requests if main goroutine has already timed out
- Replace init() with config.Load() function when loading env variables
- Inject portRegistry into session, server, and lifecycle structs
- Inject sessionRegistry directly into interaction and lifecycle
- Remove SetSessionRegistry function and global port variables
- Pass ssh.Conn directly to forwarder constructor instead of lifecycle interface
- Pass user and closeFunc callback to interaction constructor instead of lifecycle interface
- Eliminate circular dependencies between lifecycle, forwarder, and interaction
- Remove setter methods (SetLifecycle) from forwarder and interaction interfaces
Only waited for one of two copy goroutines, leaking the second. Now waits
for both to complete before closing connections.
Fixes file descriptor leak causing 'too many open files' under load.
Fixes: #56
