feat(cli): Add search, stats, embed, sync, health, and robot-docs commands

Extends the CLI with six new commands that complete the search pipeline:

- lore search <QUERY>: Hybrid search with mode selection (lexical,
  hybrid, semantic), rich filtering (--type, --author, --project,
  --label, --path, --after, --updated-after), result limits, and
  optional explain mode showing RRF score breakdowns. Safe FTS mode
  sanitizes user input; raw mode passes through for power users.

- lore stats: Document and index statistics with optional --check
  for integrity verification and --repair to fix inconsistencies
  (orphaned documents, missing FTS entries, stale dirty queue items).

- lore embed: Generate vector embeddings via Ollama. Supports
  --retry-failed to re-attempt previously failed embeddings.

- lore generate-docs: Drain the dirty queue to regenerate documents.
  --full seeds all entities for complete rebuild. --project scopes
  to a single project.

- lore sync: Full pipeline orchestration (ingest issues + MRs,
  generate-docs, embed) with --no-embed and --no-docs flags for
  partial runs. Reports per-stage results and total elapsed time.

- lore health: Quick pre-flight check (config exists, DB exists,
  schema current). Returns exit code 1 if unhealthy. Designed for
  agent pre-flight scripts.

- lore robot-docs: Machine-readable command manifest for agent
  self-discovery. Returns all commands, flags, examples, exit codes,
  and recommended workflows as structured JSON.

Also enhances lore init with --gitlab-url, --token-env-var, and
--projects flags for fully non-interactive robot-mode initialization.
Fixes init's force/non-interactive precedence logic and adds JSON
output for robot mode.

Updates all command files for the GiError -> LoreError rename.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/cli/commands/show.rs

@@ -6,7 +6,7 @@ use serde::Serialize;
 
 use crate::Config;
 use crate::core::db::create_connection;
-use crate::core::error::{GiError, Result};
+use crate::core::error::{LoreError, Result};
 use crate::core::paths::get_db_path;
 use crate::core::time::ms_to_iso;
 
@@ -188,11 +188,11 @@ fn find_issue(conn: &Connection, iid: i64, project_filter: Option<&str>) -> Resu
         .collect::<std::result::Result<Vec<_>, _>>()?;
 
     match issues.len() {
-        0 => Err(GiError::NotFound(format!("Issue #{} not found", iid))),
+        0 => Err(LoreError::NotFound(format!("Issue #{} not found", iid))),
         1 => Ok(issues.into_iter().next().unwrap()),
         _ => {
             let projects: Vec<String> = issues.iter().map(|i| i.project_path.clone()).collect();
-            Err(GiError::Ambiguous(format!(
+            Err(LoreError::Ambiguous(format!(
                 "Issue #{} exists in multiple projects: {}. Use --project to specify.",
                 iid,
                 projects.join(", ")
@@ -386,11 +386,11 @@ fn find_mr(conn: &Connection, iid: i64, project_filter: Option<&str>) -> Result<
         .collect::<std::result::Result<Vec<_>, _>>()?;
 
     match mrs.len() {
-        0 => Err(GiError::NotFound(format!("MR !{} not found", iid))),
+        0 => Err(LoreError::NotFound(format!("MR !{} not found", iid))),
         1 => Ok(mrs.into_iter().next().unwrap()),
         _ => {
             let projects: Vec<String> = mrs.iter().map(|m| m.project_path.clone()).collect();
-            Err(GiError::Ambiguous(format!(
+            Err(LoreError::Ambiguous(format!(
                 "MR !{} exists in multiple projects: {}. Use --project to specify.",
                 iid,
                 projects.join(", ")