v0.15.3

🪲 Bug fixes

• Force quoting on unsafe table identifiers (#1028) @georgesittas
• Emit the query optimization warning only when rendering the model's query @izeigerman
• Add pseudo columns for ingest time partitioned tables (#1033) @z3z1ma
• Validate model definition only after the schema for it is set (#1035) @izeigerman
• Validate model def in loader only when schema is updated @izeigerman
• Various Databricks related fixes (#1036) @eakmanrq

👽 Other

• Remove restriction on concurrent tasks (#1026) @eakmanrq
• Add notebook and UI quick start guides (#1016) @treysp
• Disregard column order when comparing dataframes in tests (#1031) @vchan