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/doctor.rs

@@ -5,7 +5,7 @@ use serde::Serialize;
 
 use crate::core::config::Config;
 use crate::core::db::{create_connection, get_schema_version, verify_pragmas};
-use crate::core::error::GiError;
+use crate::core::error::LoreError;
 use crate::core::paths::{get_config_path, get_db_path};
 use crate::gitlab::GitLabClient;
 
@@ -137,7 +137,7 @@ fn check_config(config_path: &str) -> (ConfigCheck, Option<Config>) {
             },
             Some(config),
         ),
-        Err(GiError::ConfigNotFound { path }) => (
+        Err(LoreError::ConfigNotFound { path }) => (
             ConfigCheck {
                 result: CheckResult {
                     status: CheckStatus::Error,
@@ -264,7 +264,7 @@ async fn check_gitlab(config: Option<&Config>) -> GitLabCheck {
             url: Some(config.gitlab.base_url.clone()),
             username: Some(user.username),
         },
-        Err(GiError::GitLabAuthFailed) => GitLabCheck {
+        Err(LoreError::GitLabAuthFailed) => GitLabCheck {
             result: CheckResult {
                 status: CheckStatus::Error,
                 message: Some("Authentication failed. Check your token.".to_string()),