Fixes#262
* Replace isDraftable boolean with draftOn/draftOff date fields on sport seasons
Admins can now schedule when a sport season becomes available for drafting
by setting explicit open and close dates instead of a manual toggle.
https://claude.ai/code/session_01LHYgpyimF8v8odUB6kj8Qc
* Address code review feedback on draft window implementation
- sports-data-sync: use unambiguous past placeholder dates for synced seasons,
with a comment explaining the intent
- sports-season model: remove redundant top-level lte/gte imports (callback
form already supplies them)
- _journal.json: add missing trailing newline
- sports-season test: mock ~/database/schema instead of stubbing all drizzle
builder functions, matching the established pattern in the codebase
- admin list: compute today once in component body instead of per-row
https://claude.ai/code/session_01LHYgpyimF8v8odUB6kj8Qc
* Fix: restore lte/gte imports removed in review cleanup
The relational query where-callback in this version of Drizzle does not
expose lte/gte as helper args, so they must be imported from drizzle-orm.
Removing them broke CI TypeScript.
https://claude.ai/code/session_01LHYgpyimF8v8odUB6kj8Qc
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Co-authored-by: Claude <noreply@anthropic.com>