semi implemented and features implemented save checkpoint

docs/features/unchecked/cli/hlc-status-and-timeline-query-cli-commands.md

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+# HLC Status and Timeline Query CLI Commands
+
+## Module
+Cli
+
+## Status
+IMPLEMENTED
+
+## Description
+CLI commands `stella hlc status` for Hybrid Logical Clock status inspection and `stella timeline query` for querying the immutable event timeline with temporal filtering and deterministic output ordering.
+
+## Implementation Details
+- **HLC Command Group**: `src/Cli/StellaOps.Cli/Commands/HlcCommandGroup.cs` -- HLC status commands
+- **Timeline Commands**: `src/Cli/StellaOps.Cli/Commands/TimelineCommandGroup.cs` -- timeline query commands
+- **Timestamp Commands**: `src/Cli/StellaOps.Cli/Commands/TimestampCommandGroup.cs` -- timestamp operations
+- **Tests**: `src/Cli/__Tests/StellaOps.Cli.Tests/Commands/TimestampCommandTests.cs`
+- **Commands**:
+  - `stella hlc status` -- show Hybrid Logical Clock status (node ID, current time, drift)
+  - `stella hlc now` -- get current HLC timestamp
+  - `stella timeline query` -- query event timeline. Options: `--from <time>`, `--to <time>`, `--type <event-type>`, `--limit`, `--format table|json`
+- **Deterministic ordering**: Timeline output uses HLC ordering for consistency
+
+## E2E Test Plan
+- [ ] Run `stella hlc status` and verify HLC status including node ID and clock drift
+- [ ] Run `stella hlc now` and verify current HLC timestamp
+- [ ] Run `stella timeline query` and verify event timeline displayed
+- [ ] Run `stella timeline query --from 2024-01-01 --to 2024-12-31` and verify temporal filtering
+- [ ] Run `stella timeline query --type verdict` and verify event type filtering
+- [ ] Verify deterministic output ordering (HLC-based)
+- [ ] Verify `--format json` output