feat: add optional compression fields to completion requests

Add support for compression configuration with optional fields that can be
passed per request to override API key settings.

- Add optional `enable_compression: bool | None` field to `InputObject` dataclass
- Add optional `compression_rate: float | None` field to `InputObject` dataclass
- Include compression fields in request body when provided via InputObject or dict input
- Compression fields are omitted from request when not provided
- Fields are gateway-internal and not sent to providers

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: CLEMENTINATOR

edgee/__init__.py

@@ -46,6 +46,8 @@ class InputObject:
     tools: list[dict] | None = None
     tool_choice: str | dict | None = None
     tags: list[str] | None = None
+    enable_compression: bool | None = None  # Enable token compression (gateway-internal, not sent to providers)
+    compression_rate: float | None = None  # Compression rate 0.0-1.0 (gateway-internal, not sent to providers)
 
 
 @dataclass
@@ -190,16 +192,22 @@ def send(
             tools = None
             tool_choice = None
             tags = None
+            enable_compression = None
+            compression_rate = None
         elif isinstance(input, InputObject):
             messages = input.messages
             tools = input.tools
             tool_choice = input.tool_choice
             tags = input.tags
+            enable_compression = input.enable_compression
+            compression_rate = input.compression_rate
         else:
             messages = input.get("messages", [])
             tools = input.get("tools")
             tool_choice = input.get("tool_choice")
             tags = input.get("tags")
+            enable_compression = input.get("enable_compression")
+            compression_rate = input.get("compression_rate")
 
         body: dict = {"model": model, "messages": messages}
         if stream:
@@ -210,6 +218,10 @@ def send(
             body["tool_choice"] = tool_choice
         if tags:
             body["tags"] = tags
+        if enable_compression is not None:
+            body["enable_compression"] = enable_compression
+        if compression_rate is not None:
+            body["compression_rate"] = compression_rate
 
         request = Request(
             f"{self.base_url}{API_ENDPOINT}",