docs: update AGENTS.md and CLAUDE.md with Phase B commands (bd-2fc)

Add temporal intelligence command examples: timeline, file-history,
trace, related, drift, who, count references, surgical sync.
Both AGENTS.md (project) and ~/.claude/CLAUDE.md (global) updated.

.beads/last-touched

@@ -1 +1 @@
-bd-1v8
+bd-2fc

AGENTS.md

@@ -655,9 +655,40 @@ lore --robot sync
 # Run sync without resource events
 lore --robot sync --no-events
 
+# Run sync without MR file change fetching
+lore --robot sync --no-file-changes
+
+# Surgical sync: specific entities by IID
+lore --robot sync --issue 42 -p group/repo
+lore --robot sync --mr 99 --mr 100 -p group/repo
+
 # Run ingestion only
 lore --robot ingest issues
 
+# Trace why code was introduced
+lore --robot trace src/main.rs -p group/repo
+
+# File-level MR history
+lore --robot file-history src/auth/ -p group/repo
+
+# Chronological timeline of events
+lore --robot timeline "authentication" --since 30d
+lore --robot timeline issue:42
+
+# Find semantically related entities
+lore --robot related issues 42 -n 5
+lore --robot related "authentication bug"
+
+# Detect discussion divergence from original intent
+lore --robot drift issues 42 --threshold 0.4
+
+# People intelligence
+lore --robot who src/features/auth/
+lore --robot who @username --reviews
+
+# Count references (cross-reference statistics)
+lore --robot count references
+
 # Check environment health
 lore --robot doctor