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	Commit message (Collapse)	Author	Age	Files	Lines
*	Reduce short-lived heap allocations in zenutil	Stefan Boberg	4 days	1	-43/+111
\| \| \| \| \| \| \| \| \| \| \|	- Replace Sha256ToHex fmt::format_to per-byte loop with hex lookup table and ExtendableStringBuilder - Replace AwsUriEncode per-char fmt::format for percent-encoding with hex lookup table - Replace transient fmt::format calls in SignRequestV4 and GeneratePresignedUrl with ExtendableStringBuilder appends - Return string_view from GetDateStamp instead of allocating an 8-byte std::string - Replace fmt::format for XML tag construction in ExtractXmlValue with ExtendableStringBuilder - Replace fmt::format in KeyToPath/BucketRootPath with ExtendableStringBuilder - Replace ToLower heap allocations in case-insensitive MatchWildcard with inline tolower loop - Replace fmt::format per log line in logstreamlistener with ExtendableStringBuilder
*	Simple S3 client (#836)	Stefan Boberg	2026-03-18	1	-0/+531
	This functionality is intended to be used to manage datasets for test cases, but may be useful elsewhere in the future. - Add S3 client with AWS Signature V4 (SigV4) signing — new `S3Client` in `zenutil/cloud/` supporting `GetObject`, `PutObject`, `DeleteObject`, `HeadObject`, and `ListObjects` operations - Add EC2 IMDS credential provider — automatically fetches and refreshes temporary AWS credentials from the EC2 Instance Metadata Service (IMDSv2) for use by the S3 client - Add SigV4 signing library — standalone implementation of AWS Signature Version 4 request signing (headers and query-string presigning) - Add path-style addressing support — enables compatibility with S3-compatible stores like MinIO (in addition to virtual-hosted style) - Add S3 integration tests — includes a `MinioProcess` test helper that spins up a local MinIO server, plus integration tests exercising the S3 client end-to-end - Add S3-backed `HttpObjectStoreService` tests — integration tests verifying the zenserver object store works against an S3 backend - Refactor mock IMDS into `zenutil/cloud/` — moved and generalized the mock IMDS server from `zencompute` so it can be reused by both compute and S3 credential tests