[Fix] Correct wrong signatures in the type stubs

These are the signatures users see in their IDE, and four were wrong:

- `TraceAnalyzer.__init__` declared a leading `analyzer` parameter that
  does not exist and made `analysis_param`/`analysis_option` required. The
  real signature is `(reader, output_path, analysis_param=None,
  analysis_option=None)` per `trace_analyzer.py`.
- `TraceReader.__init__` declared `**kwargs`; it actually takes
  `(trace, trace_type=UNKNOWN_TRACE, reader_init_params=None)`, and
  exposes `c_reader`, which callers rely on to pick the C fast path.
- `Request.op` defaulted to `ReqOp.READ`, which is not a member of the
  enum. `export_cache.cpp` binds the default as `OP_NOP`.
- `CacheBase.set_cache_size` was missing.

Author: haochengxia

libcachesim/__init__.pyi

@@ -18,7 +18,7 @@ class Request:
     def __init__(
         self,
         obj_size: int = 1,
-        op: ReqOp = ReqOp.READ,
+        op: ReqOp = ReqOp.OP_NOP,
         valid: bool = True,
         obj_id: int = 0,
         clock_time: int = 0,
@@ -151,6 +151,7 @@ class CacheBase:
     def to_evict(self, req: Request) -> CacheObject: ...
     def get_occupied_byte(self) -> int: ...
     def get_n_obj(self) -> int: ...
+    def set_cache_size(self, new_size: int) -> None: ...
     def print_cache(self) -> str: ...
     def process_trace(self, reader: ReaderProtocol, start_req: int = 0, max_req: int = -1) -> tuple[float, float]: ...
     @property
@@ -323,7 +324,12 @@ class PluginCache(CacheBase):
 # Readers
 class TraceReader(ReaderProtocol):
     c_reader: bool
-    def __init__(self, trace: str, trace_type: TraceType = TraceType.UNKNOWN_TRACE, **kwargs): ...
+    def __init__(
+        self,
+        trace: str,
+        trace_type: TraceType = TraceType.UNKNOWN_TRACE,
+        reader_init_params: Optional[ReaderInitParam] = None,
+    ): ...
 
 class SyntheticReader(ReaderProtocol):
     c_reader: bool
@@ -360,7 +366,13 @@ def create_uniform_requests(
 
 # Analyzer
 class TraceAnalyzer:
-    def __init__(self, analyzer, reader: ReaderProtocol, output_path: str, analysis_param, analysis_option): ...
+    def __init__(
+        self,
+        reader: ReaderProtocol,
+        output_path: str,
+        analysis_param: Optional[AnalysisParam] = None,
+        analysis_option: Optional[AnalysisOption] = None,
+    ): ...
     def run(self) -> None: ...
     def cleanup(self) -> None: ...