feat: implement 5 CLI-IMP beads — hybrid search, robot-docs, data gaps, drift, skill rewrite

Wire hybrid search (FTS5 + vector + RRF) to CLI search command.
Enhance robot-docs with quick_start guide and example_output.
Fill data gaps in issue detail (references, note counts, closed_at).
Add lore drift command for discussion divergence detection.
Rewrite agent skills to mandate lore for reads, glab for writes.

Closes: bd-1ksf, bd-91j1, bd-2g50, bd-1cjx, bd-kvij

src/cli/mod.rs

@@ -215,6 +215,24 @@ pub enum Commands {
     /// People intelligence: experts, workload, active discussions, overlap
     Who(WhoArgs),
 
+    /// Detect discussion divergence from original intent
+    Drift {
+        /// Entity type (currently only "issues" supported)
+        #[arg(value_parser = ["issues"])]
+        entity_type: String,
+
+        /// Entity IID
+        iid: i64,
+
+        /// Similarity threshold for drift detection (0.0-1.0)
+        #[arg(long, default_value = "0.4")]
+        threshold: f32,
+
+        /// Scope to project (fuzzy match)
+        #[arg(short, long)]
+        project: Option<String>,
+    },
+
     #[command(hide = true)]
     List {
         #[arg(value_parser = ["issues", "mrs"])]