fix: [AAP-65460] handle ssh:// and git+ssh:// URLs in project sync

[hsong-rh]

https://issues.redhat.com/browse/AAP-65460

Summary

• build_url() only recognized git@host:path shorthand as SSH URLs
• URLs with ssh:// or git+ssh:// schemes (common for Gitea and self-hosted VCS with non-standard ports) fell through to HTTP credential-embedding logic, corrupting the URL and causing "Permission denied (publickey)" errors
• Added early return for ssh:// and git+ssh:// scheme URLs to preserve them unchanged, matching existing behavior for git@ shorthand

Test plan

• Added unit tests for build_url() covering ssh://, git+ssh://, and ssh:// with non-standard ports
• Added integration-style tests for git_clone() verifying SSH key credential is applied correctly for all SSH URL formats
• All 28 SCM unit tests pass

Local verification

Verified end-to-end with a local Gitea instance:

1. Started Gitea container with SSH on non-standard port 2222 (podman run -d --name gitea -p 3000:3000 -p 2222:22 gitea/gitea:latest)
2. Generated ED25519 SSH keypair, added public key to Gitea
3. Created EDA Source Control credential with the private key
4. Created EDA project with URL ssh://git@<host>:2222/admin/test-rulebook.git and assigned the credential
5. Project sync completed successfully — SSH URL preserved unchanged, credential applied correctly

🤖 Generated with Claude Code

[hsong-rh]

/run-e2e

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.51%. Comparing base (1d7e5b2) to head (9926ca1).

@@            Coverage Diff             @@
##             main    #1484      +/-   ##
==========================================
+ Coverage   91.44%   91.51%   +0.06%     
==========================================
  Files         235      235              
  Lines       10135    10135              
==========================================
+ Hits         9268     9275       +7     
+ Misses        867      860       -7     

Flag	Coverage Δ
unit-int-tests-3.11	91.51% <100.00%> (+0.06%)	⬆️
unit-int-tests-3.12	91.51% <100.00%> (+0.06%)	⬆️

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Files with missing lines	Coverage Δ
src/aap_eda/services/project/scm.py	74.59% <100.00%> (+3.78%)	⬆️

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[hsong-rh]

Green e2e test: https://github.com/ansible/eda-server/actions/runs/22197118162