Warn on conflicting workflow tag registrations

[tim-smart]

Summary

• warn when a different workflow definition reuses an existing tag
• include both payload shapes in the warning
• preserve first-wins registration and keep repeated registration of the same definition silent

Validation

• pnpm vitest run packages/effect/test/cluster/ClusterWorkflowEngine.test.ts -t 'duplicate workflow tags|same workflow definition'
• pnpm dprint check packages/effect/src/unstable/cluster/ClusterWorkflowEngine.ts packages/effect/test/cluster/ClusterWorkflowEngine.test.ts
• pnpm oxlint packages/effect/src/unstable/cluster/ClusterWorkflowEngine.ts packages/effect/test/cluster/ClusterWorkflowEngine.test.ts
• pnpm --dir packages/effect check

Closes EFF-1444
Closes #8297

[changeset-bot]

🦋 Changeset detected

Latest commit: a15109d

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 31 packages

Name	Type
effect	Patch
@effect/opentelemetry	Patch
@effect/vitest	Patch
@effect/ai-anthropic	Patch
@effect/ai-openai-compat	Patch
@effect/ai-openai	Patch
@effect/ai-openrouter	Patch
@effect/ai-typesafe	Patch
@effect/atom-react	Patch
@effect/atom-solid	Patch
@effect/atom-vue	Patch
@effect/platform-browser	Patch
@effect/platform-bun	Patch
@effect/platform-deno	Patch
@effect/platform-node-shared	Patch
@effect/platform-node	Patch
@effect/sql-clickhouse	Patch
@effect/sql-d1	Patch
@effect/sql-libsql	Patch
@effect/sql-mssql	Patch
@effect/sql-mysql2	Patch
@effect/sql-pg	Patch
@effect/sql-pglite	Patch
@effect/sql-sqlite-bun	Patch
@effect/sql-sqlite-do	Patch
@effect/sql-sqlite-node	Patch
@effect/sql-sqlite-react-native	Patch
@effect/sql-sqlite-wasm	Patch
@effect/docgen	Patch
@effect/doctest	Patch
@effect/openapi-generator	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[github-actions]

Bundle Size Analysis

Generated from PR build output; treat the content below as untrusted.

File Name	Current Size	Previous Size	Difference
arbitrary-combinators.ts	37.71 KB	37.71 KB	0.00 KB (0.00%)
basic.ts	6.87 KB	6.87 KB	0.00 KB (0.00%)
batching.ts	9.95 KB	9.95 KB	0.00 KB (0.00%)
brand.ts	6.45 KB	6.45 KB	0.00 KB (0.00%)
cache.ts	10.77 KB	10.77 KB	0.00 KB (0.00%)
config.ts	21.83 KB	21.83 KB	0.00 KB (0.00%)
differ.ts	20.67 KB	20.67 KB	0.00 KB (0.00%)
http-client.ts	21.94 KB	21.94 KB	0.00 KB (0.00%)
http-router.ts	36.96 KB	36.96 KB	0.00 KB (0.00%)
logger.ts	10.88 KB	10.88 KB	0.00 KB (0.00%)
metric.ts	9.02 KB	9.02 KB	0.00 KB (0.00%)
optic.ts	6.70 KB	6.70 KB	0.00 KB (0.00%)
pubsub.ts	15.10 KB	15.10 KB	0.00 KB (0.00%)
queue.ts	11.85 KB	11.85 KB	0.00 KB (0.00%)
schedule.ts	10.96 KB	10.96 KB	0.00 KB (0.00%)
schema-bigdecimal.ts	13.40 KB	13.40 KB	0.00 KB (0.00%)
schema-binary.ts	39.82 KB	39.82 KB	0.00 KB (0.00%)
schema-class.ts	20.38 KB	20.38 KB	0.00 KB (0.00%)
schema-fromJsonSchemaDocument.ts	31.18 KB	31.18 KB	0.00 KB (0.00%)
schema-representation-roundtrip.ts	26.60 KB	26.60 KB	0.00 KB (0.00%)
schema-string-transformation.ts	13.96 KB	13.96 KB	0.00 KB (0.00%)
schema-string.ts	11.55 KB	11.55 KB	0.00 KB (0.00%)
schema-template-literal.ts	15.70 KB	15.70 KB	0.00 KB (0.00%)
schema-toArbitrary.ts	37.24 KB	37.24 KB	0.00 KB (0.00%)
schema-toCodeDocument.ts	24.84 KB	24.84 KB	0.00 KB (0.00%)
schema-toCodecJson.ts	19.61 KB	19.61 KB	0.00 KB (0.00%)
schema-toEquivalence.ts	19.75 KB	19.75 KB	0.00 KB (0.00%)
schema-toFormatter.ts	19.85 KB	19.85 KB	0.00 KB (0.00%)
schema-toJsonSchemaDocument.ts	24.15 KB	24.15 KB	0.00 KB (0.00%)
schema-toRepresentation.ts	19.89 KB	19.89 KB	0.00 KB (0.00%)
schema.ts	19.59 KB	19.59 KB	0.00 KB (0.00%)
stm.ts	12.80 KB	12.80 KB	0.00 KB (0.00%)
stream.ts	9.83 KB	9.83 KB	0.00 KB (0.00%)

[tim-smart]

Move this to the bottom of the file