Feat(mypyc)!: compile python generator (#7528)

Sync w/ integration tests

Fix(snowflake): parse GET_DDL #unknown_policy in ROW ACCESS POLICY [C…

…LAUDE] (#7491)

* Fix(snowflake): parse GET_DDL #unknown_policy in ROW ACCESS POLICY

Snowflake's GET_DDL outputs `#unknown_policy` (without ON clause) when
the user lacks privileges to see the actual policy name. Handle the `#`
token prefix in the parser and ensure it is never quoted in output.

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>

* Fix: ruff-format and mypy type errors

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>

* Fix: use X | None instead of t.Optional[X] per ruff UP007

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>

* Fix: use Var instead of Identifier for #unknown_policy to avoid quoting

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>

* Fix: simplify #unknown_policy parsing to use _parse_var directly

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>

---------

Co-authored-by: Claude Opus 4.6 (1M context) <[email protected]>

Fix: incomplete `ColumnMapping` type hint

Signed-off-by: George Sittas <[email protected]>

Fix: incomplete `ColumnMapping` type hint

Signed-off-by: George Sittas <[email protected]>

Fix(snowflake): emit proper `HANDLER` property syntax

feat(snowflake): parse and generate ROW ACCESS POLICY on views [CLAUD…

…E] (#7467)

Co-authored-by: Claude Opus 4.6 (1M context) <[email protected]>

Fix(postgres): `_date_add_sql` bug w/ interval inputs (#7440)

fix(snowflake): Fix annotate_types crashes for FLATTEN over STRUCT an…

…d WithinGroup (#7434)

Use DType arguments instead of strings in most DataType.build call sites