Fix reporting issues

[marvinruder]

• Fix last successful fetch was null in log #744 last successful fetch was null in log
• Fix No Signal message if fetching fails with HTTP response code 302 Found #745 No Signal message if fetching fails with HTTP response code 302 Found
• Fix fetch URL path is marked in green #746 fetch URL path is marked in green
• Update CSP documentation
• Add PostgreSQL client and configure psql command

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +0.00% (target: +0.00%)	✅ ∅ (target: 100.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (7ead54b)	8982	8982	100.00%
Head commit (9e9e5ec)	8982 (+0)	8982 (+0)	100.00% (+0.00%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#748)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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