feat(auto): live engine events, forward-compatible decoding, process control

[lbialy]

Deliver Pulumi engine events as they happen instead of only after the CLI exits, and stop a successful deployment from being reported as a failure.

• OnEvent / EventLog / OnProcessStart options on preview/up/refresh/destroy
• new EventLogs: tails the --event-log file on a daemon thread; parse errors are collected into parseErrors instead of failing the operation
• Other(String) on DiffKind/ProgressType/OpType for unknown wire values; fix OpTypeFormat.write to emit JsString so it survives as a Map key
• OperationFailedError keeps diagnostics/failures on the failure path, where the log was previously never parsed
• ChildProcess exposes the pulumi process; interrupt() sends SIGINT, the only signal pulumi treats as a graceful cancel
• shell.apply reimplemented as spawn + collect + join (from os-lib's call)
• results gained resourcePreEvents/resourceOperations/failures/parseErrors

tailf 0.1.0 -> 0.2.0, fixes a lot of tailf issues

[Copilot]

Pull request overview

Adds live Pulumi engine-event streaming, process cancellation controls, resilient event decoding, and richer lifecycle results.

Changes:

• Adds event-log streaming and process-start callbacks to lifecycle operations.
• Preserves unknown wire values and failure diagnostics.
• Reworks subprocess execution and expands tests.

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
auto/project.scala	Updates event-tailing and logging dependencies.
auto/src/main/scala/besom/auto/internal/AutoError.scala	Adds structured operation failures.
auto/src/main/scala/besom/auto/internal/ChildProcess.scala	Exposes process control operations.
auto/src/main/scala/besom/auto/internal/EventLogs.scala	Implements event-log parsing and live delivery.
auto/src/main/scala/besom/auto/internal/Events.scala	Preserves unknown event enum values.
auto/src/main/scala/besom/auto/internal/shell.scala	Adds process-start callbacks and process collection.
auto/src/main/scala/besom/auto/internal/Stack.scala	Integrates events, process callbacks, and richer results.
auto/src/test/scala/besom/auto/internal/EventLogsTest.scala	Tests parsing and live event delivery.
auto/src/test/scala/besom/auto/internal/LocalWorkspaceTest.scala	Tests live events and resource hierarchy.
auto/src/test/scala/besom/auto/internal/OptionsTest.scala	Tests new lifecycle options.
auto/src/test/scala/besom/auto/internal/ShellTest.scala	Tests output collection and process control.
auto/src/test/scala/besom/auto/internal/StackTest.scala	Tests forward-compatible event decoding.

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[Copilot]

Pull request overview

Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.