Preflight: untrack generated data, fix dangerous .gitignore patterns

Per plan E2/E3: ignore regenerated extraction data (sources, chunks,
extracted, carti-camp-jocuri) and replace the *test*.py / *debug*.py /
*temp*.py / *test*.db patterns that would silently hide the test suite.
Keep activities.db, the hand-written index, golden set and test fixtures.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitignore

@@ -161,23 +161,32 @@ cython_debug/
 # VS Code
 .vscode/
 
-# SQLite databases (keep main database, ignore backups and tests)
+# SQLite databases (keep main database, ignore backups and temp build files)
 *.db.backup
-*test*.db
-*debug*.db
+*.db.bak
+*.db.tmp
 *.sqlite.backup
 *.sqlite3.backup
 
-# Temporary and debug files
-*test*.py
-*debug*.py
-*temp*.py
+# Temporary files
 *.tmp
 *.backup
 *.bak
 
-# Keep main production database
+# Generated extraction data (regenerated by the pipeline, not version-controlled)
+data/carti-camp-jocuri/
+data/sources/
+data/chunks/
+data/extracted/
+
+# Keep main production database, the hand-written index, and committed golden set
 !data/activities.db
+!data/INDEX_MASTER_JOCURI_ACTIVITATI.md
+!data/golden/
+
+# Test fixtures must stay tracked despite the patterns above
+!tests/fixtures/
+!tests/fixtures/**
 
 # Windows
 desktop.ini