refactor(core,sdks): unify Retry into a single shared Context.Service

[sam-goodwin]

Summary

Per-SDK Retry Context.Service tags were never actually consumed: each packages/<sdk>/src/retry.ts declared its own Retry class but the shared makeAPI in @distilled.cloud/core/client had no way to look up N different tags and just ran a hard-coded throttling-only schedule. So Cloudflare.Retry.transient(eff), Turso.Retry.policy(...), etc. all compiled and provided a layer — but nothing read it.

This PR keeps the per-SDK tag (so policies don't bleed across SDKs — Cloudflare.Retry.transient only retries Cloudflare calls, not turso underneath) and just has each SDK's client wire its own tag into makeAPI automatically. End users just write myEffect.pipe(Cloudflare.Retry.transient) — no per-SDK config to remember.

This mirrors the AWS pattern in packages/aws/src/client/api.ts (outerFn reads Retry with Retry.makeDefault as fallback).

Changes

• packages/core/src/client.ts — ClientConfig.retry is now a required Context.Key<any, RetryPolicy>. makeAPI always reads the configured tag with Effect.serviceOption and falls back to Retry.makeDefault (transient/throttling/server with capped exponential backoff + jitter, 5 attempts). Removed the legacy hard-coded throttling-only branch.
• packages/core/src/retry.ts — kept makeRetryService as the primary API for SDKs, removed the short-lived shared Retry tag from the previous commit.
• 18 per-SDK retry.ts files (cloudflare, turso, planetscale, neon, stripe, kubernetes, axiom, posthog, gcp, coinbase, supabase, expo-eas, fly-io, mongodb-atlas, typesense, workos, prisma-postgres, azure) — each declares its own Retry tag plus matching policy, none, throttling, transient helpers (added throttling/transient everywhere for parity — previously only cloudflare had them).
• 18 per-SDK client.ts / client/api.ts files — each imports its local Retry and passes it as retry: Retry as any into the makeAPI config.

AWS continues to use its own client and Retry tag, unchanged.

Caller-facing result

import * as Cloudflare from "@distilled.cloud/cloudflare";
import * as Turso from "@distilled.cloud/turso";

myEffect.pipe(Cloudflare.Retry.transient);
myEffect.pipe(Turso.Retry.policy({ while: isMyError, schedule: mySchedule }));

Every Cloudflare/Turso/etc. API call below transparently retries transient/throttling/server errors — no per-resource Effect.retry blocks, and policies stay scoped to each SDK.

Test plan

• tsgo typecheck clean for core, aws, and 17 of 18 SDKs (cloudflare, turso, planetscale, neon, stripe, kubernetes, axiom, posthog, coinbase, supabase, fly-io, mongodb-atlas, typesense, workos, prisma-postgres, azure, expo-eas). gcp has a pre-existing unrelated readonly-array error verified against main.
• Cloudflare unit tests pass (client-api, credentials, spec-emission).
• CI: live test suites that already call Retry.transient in their test harnesses now exercise the real wiring instead of being no-ops.

[alchemy-version-bot]

Install the packages built from this commit:

@distilled.cloud/core

bun add https://pkg.distilled.cloud/core/f9eb54f

@distilled.cloud/aws

bun add https://pkg.distilled.cloud/aws/f9eb54f

@distilled.cloud/cloudflare

bun add https://pkg.distilled.cloud/cloudflare/f9eb54f

@distilled.cloud/gcp

bun add https://pkg.distilled.cloud/gcp/f9eb54f

@distilled.cloud/neon

bun add https://pkg.distilled.cloud/neon/f9eb54f

@distilled.cloud/planetscale

bun add https://pkg.distilled.cloud/planetscale/f9eb54f

@distilled.cloud/prisma-postgres

bun add https://pkg.distilled.cloud/prisma-postgres/f9eb54f

@distilled.cloud/stripe

bun add https://pkg.distilled.cloud/stripe/f9eb54f

@distilled.cloud/supabase

bun add https://pkg.distilled.cloud/supabase/f9eb54f

@distilled.cloud/posthog

bun add https://pkg.distilled.cloud/posthog/f9eb54f

@distilled.cloud/axiom

bun add https://pkg.distilled.cloud/axiom/f9eb54f

@distilled.cloud/azure

bun add https://pkg.distilled.cloud/azure/f9eb54f

@distilled.cloud/kubernetes

bun add https://pkg.distilled.cloud/kubernetes/f9eb54f

@distilled.cloud/coinbase

bun add https://pkg.distilled.cloud/coinbase/f9eb54f

@distilled.cloud/mongodb-atlas

bun add https://pkg.distilled.cloud/mongodb-atlas/f9eb54f

@distilled.cloud/fly-io

bun add https://pkg.distilled.cloud/fly-io/f9eb54f

@distilled.cloud/turso

bun add https://pkg.distilled.cloud/turso/f9eb54f

@distilled.cloud/typesense

bun add https://pkg.distilled.cloud/typesense/f9eb54f

@distilled.cloud/workos

bun add https://pkg.distilled.cloud/workos/f9eb54f

@distilled.cloud/expo-eas

bun add https://pkg.distilled.cloud/expo-eas/f9eb54f

[Mkassabov]

Make sure create-sdk/create-sdk-full are updated so this is automatic for future sdks (just tell Claude it can update the scripts).

The tests failing rn are fine, those are broken on main. Just make sure it doesn't get worse.

Most important one is supabase since its rate limit stuff is super noticable if you break it. If that test is fine the rest should be.