ENG-1162: fix importing default column functions

[LucioFranco]

Note

Ensures ClickHouse DEFAULT expressions are used as-is (no extra quoting) in DDL/ALTER generation and adds Python/TypeScript e2e tests verifying db-pull roundtrip with function defaults.

• ClickHouse DDL generation (Rust):
  • Use defaults verbatim in ALTER TABLE ... MODIFY COLUMN and CREATE TABLE paths (apps/framework-cli/src/infrastructure/olap/clickhouse.rs, .../queries.rs).
  • Remove extra formatting/quoting for defaults; preserve literals '...', numbers, and SQL functions (xxHash64(_id), now(), today()).
  • Add unit tests for function defaults in both MODIFY COLUMN and CREATE TABLE flows.
• E2E tests:
  • Add comprehensive Python and TypeScript db-pull tests validating generated model defaults and successful migrate/apply with function and literal defaults (apps/framework-cli-e2e/test/db-pull-defaults.test.ts).
  • Include special-character default cases.
• Schema utils:
  • Update ClickHouse schema introspection field from default_kind to default_type (apps/framework-cli-e2e/test/utils/database-utils.ts).

^{Written by Cursor Bugbot for commit 3ab0104. This will update automatically on new commits. Configure here.}

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ENG-1162 ClickHouse column defaults bug with Python-generated SQL

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