builds cmd refactor (#975)

- Bugfix: `builds download` partial-block fetch decisions now account for build storage host latency
- Bugfix: Transfer rate displays in `builds` commands now smooth correctly
- Split `buildstorageoperations.cpp` (8.5k lines) into per-operation TUs: buildinspect, buildprimecache, buildstorageresolve, buildupdatefolder, builduploadfolder, buildvalidatebuildpart; stats moved to buildstoragestats.h.
- FilteredRate extracted to zenutil.
- BuildsCommand shared state consolidated into a BuildsConfiguration struct; subcommands inherit from BuildsSubCmdBase holding a `const BuildsConfiguration&` instead of a `BuildsCommand&`.
- `ProgressBar` renamed to `ConsoleProgressBar`; mode enum (`ConsoleProgressMode`) lifted to namespace scope;  `PushLogOperation`/`PopLogOperation`/`ForceLinebreak` promoted to virtuals on `ProgressBase`.
- Free-function wrappers (`UploadFolder`, `DownloadFolder`, `ValidateBuildPart`) added around the existing operation classes so callers stop reimplementing setup + stats logging.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/zenutil/progress.cpp b/src/zenutil/progress.cpp
index a12076dcc..01f6529f2 100644
--- a/src/zenutil/progress.cpp
+++ b/src/zenutil/progress.cpp
@@ -14,6 +14,7 @@ public:
 	StandardProgressBar(StandardProgressBase& Owner, std::string_view InSubTask) : m_Owner(Owner), m_SubTask(InSubTask) {}
 
 	virtual void UpdateState(const State& NewState, bool DoLinebreak) override;
+	virtual void ForceLinebreak() override {}
 	virtual void Finish() override;
 
 private:
@@ -38,6 +39,8 @@ public:
 		const size_t PercentDone = StepCount > 0u ? (100u * StepIndex) / StepCount : 0u;
 		ZEN_INFO("{}: {}%", m_LogOperationName, PercentDone);
 	}
+	virtual void						 PushLogOperation(std::string_view Name) override { ZEN_UNUSED(Name); }
+	virtual void						 PopLogOperation() override {}
 	virtual uint32_t					 GetProgressUpdateDelayMS() const override { return 2000; }
 	virtual std::unique_ptr<ProgressBar> CreateProgressBar(std::string_view InSubTask) override
 	{