feat(timeline): wire up lore timeline command with human + robot renderers

Complete Gate 3 by implementing the final three beads:
- bd-2f2: Human output renderer with colored event tags, entity refs,
  evidence snippets, and expansion summary footer
- bd-dty: Robot JSON output with {ok,data,meta} envelope, ISO timestamps,
  nested via provenance, and per-event-type details objects
- bd-1nf: CLI wiring with TimelineArgs (9 flags), Commands::Timeline
  variant, handle_timeline handler, VALID_COMMANDS entry, and robot-docs
  manifest with temporal_intelligence workflow

All 7 Gate 3 children now closed. Pipeline: SEED -> HYDRATE -> EXPAND ->
COLLECT -> RENDER fully operational.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/cli/commands/mod.rs

@@ -11,6 +11,7 @@ pub mod show;
 pub mod stats;
 pub mod sync;
 pub mod sync_status;
+pub mod timeline;
 
 pub use auth_test::run_auth_test;
 pub use count::{
@@ -39,3 +40,4 @@ pub use show::{
 pub use stats::{print_stats, print_stats_json, run_stats};
 pub use sync::{SyncOptions, SyncResult, print_sync, print_sync_json, run_sync};
 pub use sync_status::{print_sync_status, print_sync_status_json, run_sync_status};
+pub use timeline::{TimelineParams, print_timeline, print_timeline_json_with_meta, run_timeline};