Merge simtrace-analyser-server into simtrace2_pysniff.server

Add simtrace2-pysniff-server CLI — HTTP API for simtrace-analyser PWA.
Two capture modes: GSMTAP UDP listener (compatible with simtrace2-sniff)
or direct SIMtrace2 hardware capture. SQLite storage with sessions +
messages tables. REST API with CORS.

server/ sub-package: database.py, capture.py, server.py, __main__.py

README updated with server usage section.
pyproject.toml: simtrace2-pysniff-server script entry added.

simtrace2_pysniff/server/__main__.py

@@ -0,0 +1,63 @@
+"""simtrace2-pysniff-server — CLI entry point.
+
+Usage:
+    simtrace2-pysniff-server --capture gsmtap [--gsmtap-port 4729] [--port 8081]
+    simtrace2-pysniff-server --capture direct [--port 8081]
+"""
+
+import argparse
+import sys
+from http.server import HTTPServer
+
+from .server import RequestHandler
+from .database import Database, DEFAULT_DB_PATH
+from .capture import CaptureManager, GsmtapListener, DirectSniffer
+
+
+def main():
+    p = argparse.ArgumentParser(
+        prog='simtrace2-pysniff-server',
+        description='HTTP API server for SIMtrace2 APDU capture and analysis')
+    p.add_argument('--port', type=int, default=8081,
+                   help='HTTP server port (default: 8081)')
+    p.add_argument('--db', default=DEFAULT_DB_PATH,
+                   help=f'SQLite database path (default: {DEFAULT_DB_PATH})')
+    p.add_argument('--capture', choices=['gsmtap', 'direct'], default='gsmtap',
+                   help='Capture mode: gsmtap (listen UDP 4729) or direct (SIMtrace2 USB)')
+    p.add_argument('--gsmtap-port', type=int, default=4729,
+                   help='UDP port for GSMTAP listener (default: 4729)')
+    args = p.parse_args()
+
+    db = Database(args.db)
+
+    if args.capture == 'gsmtap':
+        backend = GsmtapListener(bind_port=args.gsmtap_port)
+    else:
+        backend = DirectSniffer()
+
+    capture = CaptureManager(backend, db)
+
+    RequestHandler.db = db
+    RequestHandler.capture = capture
+
+    server = HTTPServer(('127.0.0.1', args.port), RequestHandler)
+
+    print(f'simtrace2-pysniff-server — http://127.0.0.1:{args.port}', file=sys.stderr)
+    print(f'  capture mode: {args.capture}', file=sys.stderr)
+    if args.capture == 'gsmtap':
+        print(f'  GSMTAP port:  {args.gsmtap_port}', file=sys.stderr)
+    print(f'  database:     {args.db}', file=sys.stderr)
+    print(file=sys.stderr)
+
+    try:
+        server.serve_forever()
+    except KeyboardInterrupt:
+        pass
+    finally:
+        if capture.active:
+            capture.stop_session()
+        server.server_close()
+
+
+if __name__ == '__main__':
+    main()