Fix normalization in france

[alvarolivie]

• Added extension as normalization ran before and would not set it.

Pre-Review Checklist

• Opened this PR as a draft
• Read the CONTRIBUTING.md guide.
• Performed a self-review of my code.
• Added thorough tests with at least 90% code coverage.
• Modified or created example GOBL documents to show my changes in use, if appropriate.
• Added links to the source of the changes in tax regimes or addons, either structured or in the comments.
• Run go generate . to ensure that the Schemas and Regime data are up to date.
• Reviewed and fixed all linter warnings.
• Been obsessive with pointer nil checks to avoid panics.
• Updated the CHANGELOG.md with an overview of my changes.
• Marked this PR as ready for review.

And if you are part of the org:

• Requested a review from Copilot and fixed or dismissed (with a reason) all the feedback raised.
• Requested a review from @samlown.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.05%. Comparing base (54ba861) to head (13cc5aa).
⚠️ Report is 41 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #753   +/-   ##
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  Coverage   93.05%   93.05%           
=======================================
  Files         333      333           
  Lines       17794    17797    +3     
=======================================
+ Hits        16558    16561    +3     
  Misses        870      870           
  Partials      366      366           

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[Copilot]

Pull request overview

This PR fixes French CTC party identity normalization by ensuring that when a SIREN identity is generated from an existing SIRET, it also gets the required ISO/IEC 6523 scheme ID extension (since the EN16931 addon has already normalized the identities slice earlier in the pipeline).

Changes:

• Set iso-scheme-id (iso.ExtKeySchemeID) on the newly generated SIREN identity (0002).
• Update the SIREN-from-SIRET normalization test to assert the scheme ID is present.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
addons/fr/ctc/org.go	Ensures generated SIREN identities include iso.ExtKeySchemeID = "0002" at creation time.
addons/fr/ctc/org_test.go	Adds an assertion verifying the generated SIREN identity includes scheme ID 0002.

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[samlown]

Is this really required? Feels like a direct mapping that doesn't really add much value.

[samlown]

👍