planner: write the vector-primary key guard as is_none_or

`cargo clippy --profile ci -p nodedb --all-targets --all-features -- -D warnings`
aborts on this expression at `vector_primary.rs:161`:

    error: this boolean expression can be simplified
        = help: ... #nonminimal_bool

so the lint job is red on `main` for every branch, and the first thing it
reports is a file no branch has touched. Clippy's own suggested rewrite is this
one, and it is the negation identity `is_none_or(f) == !is_some_and(!f)`:
`!get(k).is_some_and(|v| !matches!(v, SqlValue::Null))` becomes
`get(k).is_none_or(|v| matches!(v, SqlValue::Null))`.

All three cases agree, including the one a reader might expect to differ — an
absent key inserts the key-column value under both spellings:
  present non-null -> false / false
  present Null     -> true  / true
  absent           -> true  / true

Verified: `main` exits 101 on this file, this branch exits 0.

Author: EnRaiha

nodedb/src/control/planner/sql_plan_convert/dml/vector_primary.rs

@@ -161,9 +161,9 @@ pub(in super::super) fn convert_vector_primary_insert(
         let key_column = declared.as_deref().unwrap_or(primary_key);
         let mut fields = row.payload_fields.clone();
         if !is_auto_rowid_pk(primary_key)
-            && !fields
+            && fields
                 .get(key_column)
-                .is_some_and(|v| !matches!(v, SqlValue::Null))
+                .is_none_or(|v| matches!(v, SqlValue::Null))
         {
             fields.insert(key_column.to_string(), SqlValue::String(doc_id.clone()));
         }