Larger rate limit integers (#16047)

Tokens per day may exceed the range of Postgres's 32-bit `integer` data
type.

Release Notes:

- N/A

Co-authored-by: Marshall <marshall@zed.dev>

crates/collab/src/llm/db/queries/providers.rs

@@ -4,9 +4,9 @@ use std::str::FromStr;
 use strum::IntoEnumIterator as _;
 
 pub struct ModelRateLimits {
-    pub max_requests_per_minute: i32,
-    pub max_tokens_per_minute: i32,
-    pub max_tokens_per_day: i32,
+    pub max_requests_per_minute: i64,
+    pub max_tokens_per_minute: i64,
+    pub max_tokens_per_day: i64,
 }
 
 impl LlmDatabase {