Update docs for primary key views (#4620)

# Description of Changes

Updates the reference docs with the implications of primary key
inference for query builder views, implemented in #4572, #4573, #4614.

# API and ABI breaking changes

None

# Expected complexity level and risk

1. Docs only change

# Testing

N/A

Author: joshua-spacetime

docs/docs/00200-core-concepts/00200-functions/00500-views.md

@@ -1226,6 +1226,14 @@ fn levels_for_high_scorers(ctx: &AnonymousViewContext) -> impl Query<PlayerLevel
 </TabItem>
 </Tabs>
 
+### Primary Key Inference for Query Builder Views
+
+Query builder views may carry primary-key semantics from their underlying row type.
+When a view's row type maps to a table with a primary key,
+generated client bindings can treat the view like a primary-key table for client-cache updates.
+In particular, update callbacks (`on_update` / `OnUpdate` / `onUpdate`) will be generated for these view handles.
+If a primary key cannot be inferred for the view row type, clients fall back to insert/delete-only behavior for that view handle.
+
 ## Next Steps
 
 - Review [Subscriptions](../00400-subscriptions.md) for real-time client data access

docs/docs/00200-core-concepts/00600-clients/00500-rust-reference.md

@@ -1059,7 +1059,7 @@ The `on_delete` callback runs whenever a previously-resident row is deleted from
 spacetimedb_sdk::TableWithPrimaryKey
 ```
 
-Implemented for table handles whose tables have a primary key.
+Implemented for handles whose rows have a known primary key, including query builder views with inferred primary keys.
 
 | Name                                        | Description                                                                          |
 | ------------------------------------------- | ------------------------------------------------------------------------------------ |
@@ -1079,6 +1079,8 @@ trait spacetimedb_sdk::TableWithPrimaryKey {
 
 The `on_update` callback runs whenever an already-resident row in the client cache is updated, i.e. replaced with a new row that has the same primary key. Registering an `on_update` callback returns a callback id, which can later be passed to `remove_on_update` to cancel the callback. Newly registered or canceled callbacks do not take effect until the following event.
 
+This also applies to query builder views over tables with primary keys.
+
 ### Unique constraint index access
 
 For each unique constraint on a table, its table handle has a method whose name is the unique column name which returns a unique index handle. The unique index handle has a method `.find(desired_val: &Col) -> Option<Row>`, where `Col` is the type of the column, and `Row` the type of rows. If a row with `desired_val` in the unique column is resident in the client cache, `.find` returns it.

docs/docs/00200-core-concepts/00600-clients/00600-csharp-reference.md

@@ -1031,6 +1031,8 @@ class RemoteTableHandle
 
 The `OnUpdate` callback runs whenever an already-resident row in the client cache is updated, i.e. replaced with a new row that has the same primary key. The table must have a primary key for callbacks to be triggered. Newly registered or canceled callbacks do not take effect until the following event.
 
+This also applies to query builder views over tables with primary keys.
+
 See [the quickstart](../../00100-intro/00200-quickstarts/00600-c-sharp.md) for examples of registering and unregistering row callbacks.
 
 ### Unique constraint index access

docs/docs/00200-core-concepts/00600-clients/00700-typescript-reference.md

@@ -990,7 +990,7 @@ class TableHandle {
 
 The `onUpdate` callback runs whenever an already-resident row in the client cache is updated, i.e. replaced with a new row that has the same primary key.
 
-Only tables with a declared primary key expose `onUpdate` callbacks. Handles for tables without a declared primary key will not have `onUpdate` or `removeOnUpdate` methods.
+Only handles with a declared or inferred primary key expose `onUpdate` callbacks. Handles for tables or views without a known primary key will not have `onUpdate` or `removeOnUpdate` methods. Only views over tables with primary keys will expose `onUpdate` callbacks.
 
 The `Row` type will be an autogenerated type which matches the row type defined by the module.