fix: ensure data directory exists before init_db call (#65)

[aouwalitshikkha]

Problem

sqlite3.connect() fails with unable to open database file on fresh installs where the data/ directory does not exist. This happens with both Docker (bind mount creates ./data as root, container user can't write) and bare Python (no data/ directory at all).

Reported in #65.

Fix

3 files changed, 5 insertions added — ensures data/ exists before any database operation:

File	Change
main.py	os.makedirs("data", exist_ok=True) before init_db() call
start-librecrawl.sh	mkdir -p data at script start
start-librecrawl.bat	if not exist data mkdir data at script start

os.makedirs() was already present inside src/auth_db.py's init_db(), but the directory must exist before init_db() is reached. The startup scripts additionally ensure Docker bind mounts a pre-created directory with correct host-side permissions.

Validation

• git diff --stat: 3 files, 5 insertions, 0 deletions
• Clean targeted changes, no whitespace or line-ending noise