/auto (#16696)

Add `/auto` behind a feature flag that's disabled for now, even for
staff.

We've decided on a different design for context inference, but there are
parts of /auto that will be useful for that, so we want them in the code
base even if they're unused for now.

Release Notes:

- N/A

---------

Co-authored-by: Antonio Scandurra <me@as-cii.com>
Co-authored-by: Marshall Bowers <elliott.codes@gmail.com>

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

@@ -1,5 +1,5 @@
 use super::*;
-use sea_orm::QueryOrder;
+use sea_orm::{sea_query::OnConflict, QueryOrder};
 use std::str::FromStr;
 use strum::IntoEnumIterator as _;
 
@@ -99,6 +99,17 @@ impl LlmDatabase {
                     ..Default::default()
                 }
             }))
+            .on_conflict(
+                OnConflict::columns([model::Column::ProviderId, model::Column::Name])
+                    .update_columns([
+                        model::Column::MaxRequestsPerMinute,
+                        model::Column::MaxTokensPerMinute,
+                        model::Column::MaxTokensPerDay,
+                        model::Column::PricePerMillionInputTokens,
+                        model::Column::PricePerMillionOutputTokens,
+                    ])
+                    .to_owned(),
+            )
             .exec_without_returning(&*tx)
             .await?;
             Ok(())

crates/collab/src/llm/db/seed.rs

@@ -40,6 +40,15 @@ pub async fn seed_database(_config: &Config, db: &mut LlmDatabase, _force: bool)
             price_per_million_input_tokens: 25,   // $0.25/MTok
             price_per_million_output_tokens: 125, // $1.25/MTok
         },
+        ModelParams {
+            provider: LanguageModelProvider::Zed,
+            name: "Qwen/Qwen2-7B-Instruct".into(),
+            max_requests_per_minute: 5,
+            max_tokens_per_minute: 25_000, // These are arbitrary limits we've set to cap costs; we control this number
+            max_tokens_per_day: 300_000,
+            price_per_million_input_tokens: 25,
+            price_per_million_output_tokens: 125,
+        },
     ])
     .await
 }