Suya OCR API — vLLM-backed, OpenAI-compatible OCR service

FastAPI service wrapping the Surya-OCR-2 model (datalab-to) served through vLLM:
legacy /v1/api/ai/* endpoints, an OpenAI-compatible /v1/chat/completions endpoint,
a coalescing request batcher, a local OCR CLI, Docker packaging, multilingual
example outputs, and quantization/concurrency benchmarks.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

surya/detection/parallel.py

@@ -0,0 +1,19 @@
+class FakeFuture:
+    def __init__(self, func, *args, **kwargs):
+        self._result = func(*args, **kwargs)
+
+    def result(self):
+        return self._result
+
+class FakeExecutor:
+    def __init__(self, **kwargs):
+        pass
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *excinfo):
+        pass
+
+    def submit(self, fn, *args, **kwargs):
+        return FakeFuture(fn, *args, **kwargs)