chore: Release v0.45.7

[MeltyBot]

Prepare MeltanoSDK v0.45.7 for release.

Checklist:

• Check that the right version is set in all the files.
• Groom the changelog for wording or missing entries.
• Merge this PR once everything looks good.

Release Draft

Summary by Sourcery

Prepare and release MeltanoSDK version 0.45.7 with bug fixes and packaging improvements

Bug Fixes:

• Resolve oneOf schema references
• Generate standard stream metadata for nested fields
• Enable schema overrides for streams with hardcoded schema attributes

Build:

• Add a fallback version for hatch vcs

Chores:

• Update project version to 0.45.7

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request prepares the Meltano SDK for the v0.45.7 release. It updates the changelog with the fixes and packaging changes included in this release, and it updates the project version in pyproject.toml.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Updated the changelog to include the changes for the v0.45.7 release.	Added a new section for v0.45.7 with release date. Added fixes for resolving oneOf schema references, generating standard stream metadata for nested fields, and ensuring streams with hardcoded schema attributes can have their schema overridden by the catalog. Added a fallback-version for hatch vcs.	CHANGELOG.md
Updated the project version to 0.45.7 in pyproject.toml.	Updated the version field in the tool.commitizen section.	pyproject.toml

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[sourcery-ai]

Hey @MeltyBot - I've reviewed your changes - here's some feedback:

Overall Comments:

• Consider adding the release date to the changelog title for the previous release as well.

Here's what I looked at during the review

• 🟡 General issues: 1 issue found
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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[codspeed-hq]

CodSpeed Performance Report

Merging #2969 will not alter performance

_{Comparing release/v0.45.7 (fddc37f) with main (27d3527)}

Summary

✅ 7 untouched benchmarks

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.52%. Comparing base (27d3527) to head (fddc37f).
Report is 191 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2969   +/-   ##
=======================================
  Coverage   91.52%   91.52%           
=======================================
  Files          63       63           
  Lines        5312     5312           
  Branches      681      681           
=======================================
  Hits         4862     4862           
  Misses        318      318           
  Partials      132      132           

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