docs(examples): use semantic project identifiers

[seonghobae]

Naming repair

Align the paired vulnerable/fixed project examples with the organization naming contract without changing the security lesson.

• rename the organization-owned dynamic route parameter from id to projectId;
• rename the organization-owned example database columns id, name, and data to project_id, project_name, and project_payload_json;
• translate Supabase result keys at the adapter boundary to projectRecord and projectQueryError while preserving vendor-owned data/error keys;
• preserve the externally owned Supabase auth reference auth.users(id) exactly;
• keep user_id unchanged because it is already a meaningful multiword identifier.

Test-first evidence

RED commit 05100f7f1cdec52d7da24c7620f290843bdb7404 adds a focused static contract that fails against the prior example docs. The following two commits update the vulnerable and fixed examples together so the contract, query example, route parameter, and example DDL agree.

This changes documentation examples only: no persisted production database, migration, foreign key, index, UPSERT path, locking behavior, or runtime API is modified.

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Configuration used: Organization UI

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📥 Commits

Reviewing files that changed from the base of the PR and between e71d37e and 84176a1.

📒 Files selected for processing (3)

• examples/fixed-vibe-app/README.md
• examples/vulnerable-vibe-app/README.md
• tests/test_example_schema_naming_contract.py

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.