Address follow-up review: cheaper avatars, list limits, less chatter.

Switch avatar resize to ApproxBiLinear, cap hunt/profile/admin list queries, drop redundant admin/profile lookups, dedupe CI on app PRs, and refresh stale todo.md notes.

db/queries/questions.sql

@@ -21,7 +21,8 @@ LEFT JOIN votes v ON v.question_id = q.id
 LEFT JOIN answers a ON a.question_id = q.id
 WHERE q.hunt_date = sqlc.arg(hunt_date) AND q.hidden = 0
 GROUP BY q.id, q.author_id, u.name, q.title, q.body, q.city, q.hunt_date, q.hidden, q.created_at, a.question_id
-ORDER BY score DESC, q.created_at ASC;
+ORDER BY score DESC, q.created_at ASC
+LIMIT sqlc.arg(row_limit);
 
 -- name: GetQuestion :one
 SELECT q.id, q.author_id, u.name AS author_name, q.title, q.body, q.city, q.hunt_date, q.hidden, q.created_at,
@@ -45,7 +46,8 @@ FROM questions q
 JOIN users u ON u.id = q.author_id
 LEFT JOIN answers a ON a.question_id = q.id
 WHERE q.author_id = sqlc.arg(author_id) AND q.hidden = 0
-ORDER BY q.created_at DESC;
+ORDER BY q.created_at DESC
+LIMIT sqlc.arg(row_limit);
 
 -- name: ListQuestionsAnsweredBy :many
 SELECT q.id, q.author_id, u.name AS author_name, q.title, q.body, q.city, q.hunt_date, q.hidden, q.created_at,
@@ -56,4 +58,5 @@ FROM answers ans
 JOIN questions q ON q.id = ans.question_id
 JOIN users u ON u.id = q.author_id
 WHERE ans.author_id = sqlc.arg(admin_id) AND q.hidden = 0
-ORDER BY ans.updated_at DESC;
+ORDER BY ans.updated_at DESC
+LIMIT sqlc.arg(row_limit);

db/queries/users.sql

@@ -15,7 +15,8 @@ WHERE username = $1;
 -- name: ListUsers :many
 SELECT id, username, name, role, avatar_url, state, created_at
 FROM users
-ORDER BY created_at ASC;
+ORDER BY created_at ASC
+LIMIT sqlc.arg(row_limit);
 
 -- name: CountAdmins :one
 SELECT COUNT(*)::bigint AS count