File creation timestamp

[icppWorld]

Endpoint to get file creation timestamp & age of a file (or directory) in the canister

[Copilot]

Pull Request Overview

This PR adds a new endpoint get_creation_timestamp_ns to retrieve file creation timestamps and age information for files in the canister. The implementation provides both timestamp in nanoseconds and age in seconds for existing files.

• Adds new API endpoint get_creation_timestamp_ns for querying file creation timestamps
• Updates error handling to use consistent error response format across file operations
• Refactors helper function location from utils to files module for better organization

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/llama_cpp.did	Adds new API types and service definition for timestamp functionality
src/files.h	Declares new endpoint function and moves helper function from utils
src/files.cpp	Implements timestamp retrieval logic and updates error handling
test/test_files.py	Adds comprehensive test coverage for the new endpoint
src/utils.h	Removes helper function declaration (moved to files.h)
src/utils.cpp	Removes helper function implementation (moved to files.cpp)
src/db_chats.cpp	Adds include for files.h
native/test_files.cpp	Updates expected response format for existing test
README.md	Updates documentation with new endpoint usage examples