fix: deterministic seed data — commit all 5 parquet files (LFS)

The Space only had enrollment+attendance parquet committed (.gitignore
excluded data/*.parquet), so seed_database() fell through to the Python
generator on EVERY request, and module-level random.seed() meant each
call produced different data (e.g. 1411 vs 1446 discipline rows).

- un-ignore data/*.parquet; commit all 5 via LFS, regenerated together
for cross-table consistency (verified byte-deterministic)
- app.py startup check now requires all 5 parquet files
- generate_seed_data() re-seeds the RNG per call as defense-in-depth

.gitignore

@@ -11,7 +11,6 @@ htmlcov/
 build/
 dist/
 data/*.duckdb
-data/*.parquet
 
 # Git worktrees
 .worktrees/

app.py

@@ -28,7 +28,10 @@ print("🚀 Starting Kasualdad LFED...")
 # Ensure Parquet seed files exist (generate on first boot, persist in /data/)
 from pathlib import Path
 _parquet_dirs = [Path("/data"), Path(__file__).parent / "data"]
-_pq_files = ["enrollment.parquet", "attendance.parquet"]
+_pq_files = [
+    "enrollment.parquet", "attendance.parquet", "students.parquet",
+    "discipline.parquet", "grades.parquet",
+]
 _pq_found = any(
     all((base / f).exists() for f in _pq_files)
     for base in _parquet_dirs

data/discipline.parquet

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:94f24545806860637cba9c220f9bc7a0f1178cb84150d35e3196c95464579571
+size 21710

data/generate_seed.py

@@ -346,6 +346,11 @@ def generate_seed_data(conn: duckdb.DuckDBPyConnection) -> None:
       - grades(student_id, school_name, school_year, grade_level, course_name,
                term, letter_grade, grade_numeric, gpa)
     """
+    # Re-seed on every call: module-level random.seed(SEED) only fixes the
+    # RNG once per process, so repeated calls (e.g. per-request fallback
+    # seeding) would otherwise produce different data each time.
+    random.seed(SEED)
+
     # 1. Create tables
     conn.execute("""
         CREATE TABLE IF NOT EXISTS enrollment (

data/grades.parquet

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ffe31388dc5f68e38e68c7471a3a6a7cbbaad816220c1b3a1122feb7a264077b
+size 186893

data/students.parquet

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:9d1bd844bdc7afc398bb3e6440908000b37150a60a0b71333138820900f6ccb1
+size 18179