fix(cli): add verbose log flag

[ahfoysal]

Description

Adds -v / --verbose as a shortcut for INFO-level DockSec logs without overriding an existing DOCKSEC_LOG_LEVEL.

Closes #129

Type of Change

• New feature
• Documentation update
• Test update

How Has This Been Tested?

• Unit tests
• Manual testing

Test Configuration:

• Python version: 3.12.13
• Operating System: macOS
• DockSec version: 2026.7.3

Checklist

• Code follows the style guidelines of this project
• Self-review completed
• Hard-to-understand areas are commented
• Documentation updated where needed
• No new warnings or errors introduced
• Tests added that prove the fix or feature works
• All existing tests pass
• Dependent changes have been merged and published
• Spelling checked

Screenshots (if applicable)

N/A

Related Issues / PRs

• Relates to [GOOD FIRST ISSUE] Add a --verbose/-v flag as a shortcut for DOCKSEC_LOG_LEVEL=INFO #129

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By submitting this pull request, I confirm that my contribution is made under the terms of the MIT license.

[advaitpatel]

lgtm

[codecov-commenter]

Codecov Report

❌ Patch coverage is 96.66667% with 1 line in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (main@69918a4). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
docksec/cli.py	75.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #151   +/-   ##
=======================================
  Coverage        ?   78.53%           
=======================================
  Files           ?       26           
  Lines           ?     4057           
  Branches        ?        0           
=======================================
  Hits            ?     3186           
  Misses          ?      871           
  Partials        ?        0           

Flag	Coverage Δ
unittests	78.53% <96.66%> (?)

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