Description

The self-hosted REST API server (server/main.py) silently drops several parameters that the underlying Memory class supports. The Pydantic request models don't declare these fields, so they are silently ignored by Pydantic v2's default behavior (extra='ignore').

This PR adds the missing fields to the Pydantic models:

• SearchRequest: added limit (int) and threshold (float)
• MemoryCreate: added infer (bool), memory_type (str), and prompt (str)

All fields are Optional with None defaults and Field descriptions for OpenAPI docs. No handler changes needed — the existing model_dump() + **params pattern automatically forwards these to Memory.search() and Memory.add().

Fixes #3976

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

39 new tests in tests/test_server_params.py covering:

• Parameter forwarding (15 tests): Each new field is accepted via HTTP and forwarded to the correct Memory method with the correct value
• Omission behavior (7 tests): When a field is not sent, it is excluded from kwargs, letting Memory use its own defaults
• Falsy value edge cases (2 tests): infer=False and threshold=0.0 are not incorrectly filtered out by the v is not None check
• Explicit null handling (3 tests): Sending null for optional fields correctly omits them
• Type validation (6 tests): Invalid types (string for int, float for int, etc.) return 422
• Unknown field handling (2 tests): Extra/unknown fields are still silently ignored (existing Pydantic behavior preserved)
• Backward compatibility (2 tests): Existing params (filters, metadata, user_id, etc.) continue to work
• OpenAPI schema (5 tests): All new fields appear in auto-generated API docs with descriptions
• Call signature validation (4 tests): Forwarded kwargs match Memory.add() / Memory.search() parameter names

All 113 server tests pass (74 auth + 39 params):

$ python -m pytest tests/test_server_auth.py tests/test_server_params.py -v
====================== 113 passed in 1.92s =======================

• Unit Test

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have checked my code and corrected any misspellings

Maintainer Checklist

• closes REST API server silently drops limit, threshold, and infer parameters #3976
• closes Can the search method limit the number of memory entries returned #3819
• closes search方法限制搜索条数参数不生效 #3813
• Made sure Checks passed