Bypass custom logic on import, and end every run with its total time

[imranakram]

Adds the option to import without running custom business logic, as asked in #16, and ends every run with its total time.

Bypassing custom logic

Three optional attributes on <ShuffleDefinition>, all off by default:

<ShuffleDefinition BypassSyncLogic="true" BypassAsyncLogic="true" BypassFlows="true">

Attribute	Skips	Sent as
BypassSyncLogic	Synchronous plugins and real-time workflows	BypassBusinessLogicExecution = CustomSync
BypassAsyncLogic	Asynchronous plugins and background workflows	BypassBusinessLogicExecution = CustomAsync
BypassFlows	Power Automate flows triggered by Dataverse	SuppressCallbackRegistrationExpanderJob = true

• The setting is on the definition, not per block. Bypass is a decision about the whole load, and one switch means no block can be forgotten. A per-block override can be added later without breaking anything.
• Every write in every data block carries the parameters: batched and single creates and updates, upserts, deletes, state and owner changes (including the deferred pass) and N:N associations. BypassLogicService wraps the organization service for the data blocks, so the Xrm.Utils.Core helpers that call the service directly are covered too, and each request inside an ExecuteMultiple gets the parameters. Solution blocks keep the plain service.
• Older on-premises servers: 9.0 and 9.1 only know BypassCustomPluginExecution, which covers sync logic; older versions can't bypass at all. A definition is often shared between online and on-premises, so what a server can't bypass runs as usual: the import logs a warning (WARNING: This server (9.1.0.0) cannot bypass async plugins and workflows or Power Automate flows. They run as usual during this import.) and carries on. The Builder tooltips say the same.
• Privilege: the user needs prvBypassCustomBusinessLogic. Without it, the first write fails with Dataverse's own error.
• Builder: three checkboxes with tooltips on the ShuffleDefinition node.
• Log: one line at the start, for example Bypassing custom logic: sync, async, flows (BypassBusinessLogicExecution=CustomSync,CustomAsync, SuppressCallbackRegistrationExpanderJob=True).

Measured: about 15,000 records into a fresh environment took 1 h 54 min with the previous release (one request per record, logic running). With batches of 250 and bypass on, it took 2 minutes.

Total run time

Every import and export now ends with a line in the log, the Runner and the pipeline output:

Import finished in 1 min 58 s: 14970 created, 0 updated, 0 skipped, 0 deleted, 0 failed
Export finished in 4.2 s: 2 records

Tests

• Layer 1: BypassLogicServiceTests (which requests get the parameters and which don't, the parameter mapping and warnings per server version) and RunDurationTests.
• Layer 3: BypassLogicImportTests runs whole definitions: every write of every block carries the parameters; a definition without the attributes sends none; the deferred state pass; the legacy parameter on each ExecuteMultiple request on 9.1; the warning and completed import on 9.1 and 8.2. A round-trip test checks the run-time line in the log and in what the listener hears.

All 304 tests pass in Debug and Release. The README has a "Bypassing custom logic" section, and all three nuspecs have release notes.

Fixes #16