zenstore bug-fixes from static analysis pass (#815)

**Bug fixes across zenstore, zenremotestore, and related subsystems, primarily surfaced by static analysis.**

## Cache subsystem (cachedisklayer.cpp)

- Fixed tombstone scoping bug: tombstone flag and missing entry were recorded outside the block where data was removed, causing non-missing entries to be incorrectly tombstoned
- Fixed use-after-overwrite: `RemoveMemCachedData`/`RemoveMetaData` were called after `Payload` was overwritten on cache put, leaking stale data
- Fixed incorrect retry sleep formula (`100 - (3 - RetriesLeft) * 100` always produced the same or negative value; corrected to `(3 - RetriesLeft) * 100`)
- Fixed broken `break` missing from sidecar file read loop, causing reads past valid data
- Fixed missing format argument in three `ZEN_WARN`/`ZEN_ERROR` log calls (format string had `{}` placeholders with no corresponding argument, or vice versa)
- Fixed elapsed timer being accumulated inside the wrong scope in `HandleRpcGetCacheRecords`
- Fixed test asserting against unserialized `RecordPolicy` instead of the deserialized `Loaded` copy
- Initialized `AbortFlag`/`PauseFlag` atomics at declaration (UB if read before first write)

## Build store (buildstore.cpp / buildstore.h)

- Fixed wrong variable used in warning log: used loop index `ResultIndex` instead of `Index`/`MetaLocationResultIndexes[Index]`, logging wrong hash values
- Fixed `sizeof(AccessTimesHeader)` used instead of `sizeof(AccessTimeRecord)` when advancing write offset, corrupting the access times file if the sizes differ
- Initialized `m_LastAccessTimeUpdateCount` atomic member (was uninitialized)
- Changed map iteration loops to use `const auto&` to avoid unnecessary copies

## Project store (projectstore.cpp / projectstore.h)

- Fixed wrong iterator dereferenced in `IterateChunks`: used `ChunkIt->second` (from a different map lookup) instead of `MetaIt->second`
- Fixed wrong assert variable: `Sizes[Index]` should be `RawSizes[Index]`
- Fixed `MakeTombstone`/`IsTombstone` inconsistency: `MakeTombstone` was zeroing `OpLsn` but `IsTombstone` checks `OpLsn.Number != 0`; tombstone creation now preserves `OpLsn`
- Fixed uninitialized `InvalidEntries` counter
- Fixed format string mismatch in warning log
- Initialized `AbortFlag`/`PauseFlag` atomics; changed map iteration to `const auto&`

## Workspaces (workspaces.cpp)

- Fixed missing alias registration when a workspace share is updated: alias was deleted but never re-inserted
- Fixed integer overflow in range clamping: `(RequestedOffset + RequestedSize) > Size` could wrap; corrected to `RequestedSize > Size - RequestedOffset`
- Changed map iteration loops to `const auto&`

## CAS subsystem (cas.cpp, caslog.cpp, compactcas.cpp, filecas.cpp)

- Fixed `IterateChunks` passing original `Payload` buffer instead of the modified `Chunk` buffer (content type was set on the copy but the original was sent to the callback)
- Fixed invalid `std::future::get()` call on default-constructed futures
- Fixed sign-comparison in `CasLogFile::Replay` loop (`int i` vs `size_t`)
- Changed `CasLogFile::IsValid` and `Open` to take `const std::filesystem::path&` instead of by value
- Fixed format string in `~CasContainerStrategy` error log

## Remote store (zenremotestore)

- Fixed `FolderContent::operator==` always returning true: loop variable `PathCount` was initialized to 0 instead of `Paths.size()`
- Fixed `GetChunkIndexForRawHash` looking up from wrong map (`RawHashToSequenceIndex` instead of `ChunkHashToChunkIndex`)
- Fixed double-counted `UniqueSequencesFound` stat (incremented in both branches of an if/else)
- Fixed `RawSize` sentinel value truncation: `(uint32_t)-1` assigned to a `uint64_t` field; corrected to `(uint64_t)-1`
- Initialized uninitialized atomic and struct members across `buildstorageoperations.h`, `chunkblock.h`, and `remoteprojectstore.h`

1 files changed, 7 insertions, 7 deletions

diff --git a/src/zenstore/filecas.cpp b/src/zenstore/filecas.cpp
index 295451818..0088afe6e 100644
--- a/src/zenstore/filecas.cpp
+++ b/src/zenstore/filecas.cpp
@@ -383,7 +383,7 @@ FileCasStrategy::InsertChunk(IoBuffer Chunk, const IoHash& ChunkHash, CasStore::
 		HRESULT WriteRes = PayloadFile.Write(Cursor, Size);
 		if (FAILED(WriteRes))
 		{
-			ThrowSystemException(hRes, fmt::format("failed to write {} bytes to shard file '{}'", ChunkSize, ChunkPath));
+			ThrowSystemException(WriteRes, fmt::format("failed to write {} bytes to shard file '{}'", ChunkSize, ChunkPath));
 		}
 	};
 #else
@@ -669,8 +669,8 @@ FileCasStrategy::IterateChunks(std::span<IoHash>												 ChunkHashes,
 			return true;
 		};
 
-		std::atomic<bool> AbortFlag;
-		std::atomic<bool> PauseFlag;
+		std::atomic<bool> AbortFlag{false};
+		std::atomic<bool> PauseFlag{false};
 		ParallelWork	  Work(AbortFlag, PauseFlag, WorkerThreadPool::EMode::DisableBacklog);
 		try
 		{
@@ -823,8 +823,8 @@ FileCasStrategy::ScrubStorage(ScrubContext& Ctx)
 
 	ZEN_INFO("discovered {} files @ '{}' ({} not in index), scrubbing", m_Index.size(), m_RootDirectory, DiscoveredFilesNotInIndex);
 
-	std::atomic<bool> Abort;
-	std::atomic<bool> Pause;
+	std::atomic<bool> Abort{false};
+	std::atomic<bool> Pause{false};
 	ParallelWork	  Work(Abort, Pause, WorkerThreadPool::EMode::DisableBacklog);
 
 	try
@@ -1016,7 +1016,7 @@ FileCasStrategy::MakeIndexSnapshot(bool ResetLog)
 				{
 					// This is non-critical, it only means that we will replay the events of the log over the snapshot - inefficent but in
 					// the end it will be the same result
-					ZEN_WARN("Snapshot failed to clean log file '{}', reason: '{}'", LogPath, IndexPath, Ec.message());
+					ZEN_WARN("Snapshot failed to clean log file '{}', reason: '{}'", LogPath, Ec.message());
 				}
 				m_CasLog.Open(LogPath, CasLogFile::Mode::kWrite);
 			}
@@ -1052,7 +1052,7 @@ FileCasStrategy::ReadIndexFile(const std::filesystem::path& IndexPath, uint32_t&
 		uint64_t Size = ObjectIndexFile.FileSize();
 		if (Size >= sizeof(FileCasIndexHeader))
 		{
-			uint64_t		   ExpectedEntryCount = (Size - sizeof(sizeof(FileCasIndexHeader))) / sizeof(FileCasIndexEntry);
+			uint64_t		   ExpectedEntryCount = (Size - sizeof(FileCasIndexHeader)) / sizeof(FileCasIndexEntry);
 			FileCasIndexHeader Header;
 			ObjectIndexFile.Read(&Header, sizeof(Header), 0);
 			if ((Header.Magic == FileCasIndexHeader::ExpectedMagic) && (Header.Version == FileCasIndexHeader::CurrentVersion) &&