Allow patching pinned on long-term memories

[tylerhutcherson]

Enables editing pinned on existing long-term memories via PATCH /v1/long-term-memory/{memory_id}

This adds pinned to the edit request model, allows it in the server update path, keeps MCP edit parity, and adds focused regression tests for API, service, and MCP behavior.

Fixes #175

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Note

Low Risk
Low risk, additive change that only extends the long-term memory edit path to accept an optional pinned flag; behavior is covered by new API/service/MCP regression tests.

Overview
Adds support for editing pinned on existing long-term memories. The PATCH /v1/long-term-memory/{memory_id} update path now allows pinned in the server-side updatable field set and in the EditMemoryRecordRequest model.

Keeps MCP parity by extending edit_long_term_memory to accept/pass through pinned, and adds focused tests covering API patch requests and the underlying update_long_term_memory behavior for pin/unpin.

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[github-actions]

Review completed. No suggestions at this time.

[jit-ci]

🛡️ Jit Security Scan Results

✅ No security findings were detected in this PR

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^{Security scan by Jit}

[Copilot]

Pull request overview

This PR extends long-term memory editing to support updating the pinned flag (used to protect memories from auto-deletion), and adds regression tests to ensure the flag is correctly passed through MCP, API, and storage update layers.

Changes:

• Add pinned to the editable/updateable fields for long-term memories (MCP tool + core update validation).
• Extend EditMemoryRecordRequest to accept pinned updates.
• Add unit/integration tests covering pinned=True/False updates via MCP, API PATCH, and update_long_term_memory.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/test_mcp.py	Adds MCP regression test ensuring edit_long_term_memory forwards pinned into the core update call.
tests/test_long_term_memory.py	Adds unit tests verifying update_long_term_memory persists pinned changes to the vector DB adapter.
tests/test_api.py	Adds API PATCH tests ensuring pinned can be patched alone or with other editable fields.
agent_memory_server/models.py	Adds pinned to EditMemoryRecordRequest so API/MCP update payloads can include it.
agent_memory_server/mcp.py	Adds pinned parameter to the MCP edit_long_term_memory tool and forwards it into the update request.
agent_memory_server/long_term_memory.py	Allows pinned in the update_long_term_memory updatable-fields allowlist.

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[nkanu17]

lgtm