fix: dispatch BN API calls to main thread via QTimer queue to prevent deadlocks

[kings0527]

Problem

BN API calls from the HTTP handler's daemon thread deadlock against the main (UI) thread. This makes all endpoints except /status hang indefinitely when the plugin is running inside the Binary Ninja GUI.

Additionally, _prune_views() uses Python is identity checks on BinaryView wrapper objects, but getCurrentBinaryView() returns a new Python wrapper each time. This causes _current_view to be repeatedly cleared on every timer tick.

Solution

Introduce a lightweight dispatch queue (_main_thread_queue) that the existing QTimer tick drains every 200ms, executing queued callables on the main thread and signalling completion back to the waiting HTTP thread.

Key changes:

binary_operations.py

• Add _main_thread_queue and _run_on_main_thread() helper that posts a callable + threading.Event, waits for the result, and detects re-entrant calls to avoid nested deadlock
• Wrap get_function_by_name_or_address() and get_function_names() with _run_on_main_thread
• Remove identity-based _current_view clearing in _prune_views(); the strong reference should only be cleared by explicit stop/close
• Remove update_analysis_and_wait() calls that block the event loop when executed inside a QTimer callback

init.py

• QTimer _tick() now drains _main_thread_queue before doing BV discovery, and records _main_thread_id on first tick
• Timer interval reduced from 1000ms to 200ms for lower API latency

http_server.py

• do_GET / do_POST dispatch their entire handler body to the main thread via _dispatch_on_main_thread(), except /status which is handled directly
• New _do_GET_inner / _do_POST_inner methods contain the original routing logic
• TimeoutError → 504 response

endpoints.py

• search_functions() wrapped with _run_on_main_thread

Testing

Tested with Binary Ninja 5.2 on macOS ARM64:

• /status ✅ (responds instantly, no main-thread dispatch needed)
• /functions?limit=5 ✅ (returns function list, 69k+ functions)
• /exports?limit=20 ✅ (returns exports)
• /decompile?name=JNI_OnLoad ✅ (returns decompiled output)
• /searchFunctions?query=main ✅ (returns search results)