feat(integrations): add mixpanel Stripe catalog provider

[snowmead]

Summary

• Adds the mixpanel Stripe Projects catalog integration family as CatalogResource adapter(s).
• Follows docs/ADDING-A-PROVIDER.md and docs/PROVIDER-WAVES.md.
• Includes gap test + hermetic provision test. OUTPUT_FIELDS provisional until mise run discover.

Test plan

• Gap + hermetic tests in module
• Live mise run discover when provider is linked
• Merge after resolving additive registry.rs conflict with other family PRs

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Note

Low Risk
Additive integration registration and shared SDK helpers with offline tests; provisional output envelope may need discover before live smoke.

Overview
Adds a Phase 1 Stripe Projects CatalogResource for mixpanel/analytics: managed global integration with empty config schema, provisional token output (MIXPANEL_TOKEN), catalog gap test, and hermetic provision_script test. Registers MixpanelAnalytics in register_providers! and extends the Hostable::OUTPUTS vs OUTPUT_FIELDS drift test.

Extends stackless-provider-sdk with int_optional, bool_required, and bool_optional config helpers (alongside existing int_required) for generated/schema-heavy integrations.

Documents catalog-first rollout: PROVIDER-WAVES.md, DECISIONS.md entry, link from ADDING-A-PROVIDER.md, plus scripts/generate_catalog_integrations.py to scaffold remaining deployables (Mixpanel included in hints).

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Cursor Bugbot has reviewed your changes using default effort and found 2 potential issues.

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Generator skips implemented mixpanel

Medium Severity

The new mixpanel/analytics adapter is registered in-tree, but IMPLEMENTED in generate_catalog_integrations.py does not include mixpanel/analytics. Running the generator still treats Mixpanel as unimplemented and can overwrite providers/mixpanel and rewrite registry.rs / providers/mod.rs, undoing this PR’s hand-landed family work.

 

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Codegen maps numbers to strings

Medium Severity

In generate_catalog_integrations.py, schema properties with type number get Rust fields via rust_type as f64 / Option<f64>, but build_config emits interp_required / interp_optional, which produce strings. Generated modules for deployables with numeric config will not type-check or serialize correct JSON numbers.

 

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