PR(-): Log Server Error On 'Schema Adding Failure'

Now will log the error on the server like so:

```
2024-02-28T20:30:25.154-0500, INFO, net, Created LibP2P host, {"PeerId": "12D3KooWJMRCnMLvppLUaAZwzPsWPhfk6w7wmyPdu4wUEnUVUUVP", "Address": ["/ip4/127.0.0.1/tcp/9171"]}
2024-02-28T20:30:25.156-0500, INFO, cli, Starting DefraDB
2024-02-28T20:30:25.156-0500, INFO, net, Starting internal broadcaster for pubsub network
2024-02-28T20:30:26.975-0500, ERROR, db, could not add schema, {"Error": "collection already exists"}
2024-02-28T20:30:26.975-0500, INFO, http, Request, {"Method": "POST", "Path": "/api/v0/schema", "Status": 400, "LengthBytes": 38, "ElapsedTime": "526.443┬╡s"}
```

db/errors.go

@@ -23,6 +23,7 @@ const (
 	errDocVerification                    string = "the document verification failed"
 	errAddingP2PCollection                string = "cannot add collection ID"
 	errRemovingP2PCollection              string = "cannot remove collection ID"
+	errCouldNotAddSchema                  string = "could not add schema"
 	errAddCollectionWithPatch             string = "unknown collection, adding collections via patch is not supported"
 	errCollectionIDDoesntMatch            string = "CollectionID does not match existing"
 	errSchemaRootDoesntMatch              string = "SchemaRoot does not match existing"

db/schema.go

@@ -49,6 +49,7 @@ func (db *db) addSchema(
 	if err != nil {
 		return nil, err
 	}
+
 	returnDescriptions := make([]client.CollectionDescription, len(newDefinitions))
 	for i, definition := range newDefinitions {
 		col, err := db.createCollection(ctx, txn, definition)

db/txn_db.go

@@ -186,6 +186,7 @@ func (db *implicitTxnDB) AddSchema(ctx context.Context, schemaString string) ([]
 
 	cols, err := db.addSchema(ctx, txn, schemaString)
 	if err != nil {
+		log.ErrorE(ctx, errCouldNotAddSchema, err)
 		return nil, err
 	}
 
@@ -201,7 +202,12 @@ func (db *implicitTxnDB) AddSchema(ctx context.Context, schemaString string) ([]
 // All schema types provided must not exist prior to calling this, and they may not reference existing
 // types previously defined.
 func (db *explicitTxnDB) AddSchema(ctx context.Context, schemaString string) ([]client.CollectionDescription, error) {
-	return db.addSchema(ctx, db.txn, schemaString)
+	cols, err := db.addSchema(ctx, db.txn, schemaString)
+	if err != nil {
+		log.ErrorE(ctx, errCouldNotAddSchema, err)
+		return nil, err
+	}
+	return cols, nil
 }
 
 // PatchSchema takes the given JSON patch string and applies it to the set of CollectionDescriptions