Fix bug: keep fig_no as str not float

[karm-patel]

Decryption

• Resolve bug in upload_urls_to_firestore()
• Add create_firestore_db() in url_utils to create db instance of firestore
• Resolve initialize_app(cred) bug in create_firestore_db()

[coveralls]

Pull Request Test Coverage Report for Build 2273893177

• 4 of 14 (28.57%) changed or added relevant lines in 1 file are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.09%) to 23.762%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
probml_utils/url_utils.py	4	14	28.57%

Files with Coverage Reduction	New Missed Lines	%
probml_utils/url_utils.py	2	42.98%

Totals
Change from base Build 2266015389:	0.09%
Covered Lines:	288
Relevant Lines:	1212

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💛 - Coveralls