fix(ingestion): label upsert reliability, init idempotency, and sync health

Label upsert (issues + merge_requests): Replace INSERT ... ON CONFLICT DO
UPDATE RETURNING with INSERT OR IGNORE + SELECT. The prior RETURNING-based
approach relied on last_insert_rowid() matching the returned id, which is
not guaranteed when ON CONFLICT triggers an update (SQLite may return 0).
The new two-step approach is unambiguous and correctly tracks created_count.

Init: Add ON CONFLICT(gitlab_project_id) DO UPDATE to the project insert
so re-running `lore init` updates path/branch/url instead of failing with
a unique constraint violation.

MR discussions sync: Reset discussions_sync_attempts to 0 when clearing a
sync health error, so previously-failed MRs get a fresh retry budget after
successful sync.

Count: format_number now handles negative numbers correctly by extracting
the sign before inserting thousand-separators.

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

src/cli/commands/count.rs

@@ -179,9 +179,15 @@ fn count_notes(conn: &Connection, type_filter: Option<&str>) -> Result<CountResu
 }
 
 fn format_number(n: i64) -> String {
-    let s = n.to_string();
+    let (prefix, abs) = if n < 0 {
+        ("-", n.unsigned_abs())
+    } else {
+        ("", n.unsigned_abs())
+    };
+
+    let s = abs.to_string();
     let chars: Vec<char> = s.chars().collect();
-    let mut result = String::new();
+    let mut result = String::from(prefix);
 
     for (i, c) in chars.iter().enumerate() {
         if i > 0 && (chars.len() - i).is_multiple_of(3) {

src/cli/commands/init.rs

@@ -133,7 +133,11 @@ pub async fn run_init(inputs: InitInputs, options: InitOptions) -> Result<InitRe
     for (_, gitlab_project) in &validated_projects {
         conn.execute(
             "INSERT INTO projects (gitlab_project_id, path_with_namespace, default_branch, web_url)
-             VALUES (?, ?, ?, ?)",
+             VALUES (?, ?, ?, ?)
+             ON CONFLICT(gitlab_project_id) DO UPDATE SET
+               path_with_namespace = excluded.path_with_namespace,
+               default_branch = excluded.default_branch,
+               web_url = excluded.web_url",
             (
                 gitlab_project.id,
                 &gitlab_project.path_with_namespace,

src/ingestion/issues.rs

@@ -299,18 +299,21 @@ fn upsert_label_tx(
     name: &str,
     created_count: &mut usize,
 ) -> Result<i64> {
+    tx.execute(
+        "INSERT OR IGNORE INTO labels (project_id, name) VALUES (?1, ?2)",
+        (project_id, name),
+    )?;
+
+    if tx.changes() > 0 {
+        *created_count += 1;
+    }
+
     let id: i64 = tx.query_row(
-        "INSERT INTO labels (project_id, name) VALUES (?1, ?2)
+        "SELECT id FROM labels WHERE project_id = ?1 AND name = ?2",
-         ON CONFLICT(project_id, name) DO UPDATE SET name = excluded.name
-         RETURNING id",
         (project_id, name),
         |row| row.get(0),
     )?;
 
-    if tx.last_insert_rowid() == id {
-        *created_count += 1;
-    }
-
     Ok(id)
 }
 

src/ingestion/merge_requests.rs

@@ -295,18 +295,21 @@ fn upsert_label_tx(
     name: &str,
     created_count: &mut usize,
 ) -> Result<i64> {
+    tx.execute(
+        "INSERT OR IGNORE INTO labels (project_id, name) VALUES (?1, ?2)",
+        (project_id, name),
+    )?;
+
+    if tx.changes() > 0 {
+        *created_count += 1;
+    }
+
     let id: i64 = tx.query_row(
-        "INSERT INTO labels (project_id, name) VALUES (?1, ?2)
+        "SELECT id FROM labels WHERE project_id = ?1 AND name = ?2",
-         ON CONFLICT(project_id, name) DO UPDATE SET name = excluded.name
-         RETURNING id",
         (project_id, name),
         |row| row.get(0),
     )?;
 
-    if tx.last_insert_rowid() == id {
-        *created_count += 1;
-    }
-
     Ok(id)
 }
 

src/ingestion/mr_discussions.rs

@@ -593,6 +593,7 @@ fn clear_sync_health_error(conn: &Connection, local_mr_id: i64) -> Result<()> {
     conn.execute(
         "UPDATE merge_requests SET
             discussions_sync_last_attempt_at = ?,
+            discussions_sync_attempts = 0,
             discussions_sync_last_error = NULL
          WHERE id = ?",
         params![now_ms(), local_mr_id],