Build the canonical sharded Workshop feature census

[Teakowa]

Parent: #10
Depends on: #18

Goal

Build a canonical Workshop feature census that exercises the currently declared semantic/catalog surface in independently attributable shards and reports results through the conformance contract from #18.

Context

A single monolithic “all features” script is useful as client evidence but poor as a diagnostic gate: one syntax or catalog failure can obscure unrelated coverage. The census therefore needs stable feature attribution and practical shards while remaining canonical Workshop evidence owned by workshop-rs.

Scope

• Define census shards for the current declared surface, including at least events, actions, values, enums/content IDs, settings, variables/subroutines, control flow, and strings/localization where supported.
• Derive coverage from reviewed canonical catalog/WIR capabilities rather than duplicated hand-maintained provider inventories.
• Ensure every census case maps to one or more stable Define the Workshop conformance result contract and stable feature identities #18 feature identities and produces machine-readable conformance results.
• Gate supported cases through parse -> canonical semantics/validation -> emit using semantic/normalized equivalence rather than formatting identity.
• Exercise the declared en-US and zh-CN locale conversion surface and attribute locale-specific failures separately from semantic failures.
• Make known gaps, unsupported capabilities, and inconclusive cases explicit rather than dropping them or counting them as success.
• Provide a deterministic way to assemble/export census shards for later live-client validation without requiring one giant source file as the primary test representation.
• Add CI/test integration appropriate to the repository without replacing focused parser/catalog/emitter/unit tests.

Non-goals

• Claiming live gameplay/runtime correctness from offline census execution.
• Adding missing Workshop semantics merely to make the census green without independent evidence.
• Copying OPY or DEL/OSTW source-language inventories into this repository.
• Requiring byte-identical output or identical formatting.
• Implementing the seasonal client-capture workflow itself.

Acceptance criteria

• The currently declared Workshop semantic/catalog surface is represented by deterministic census shards with stable Define the Workshop conformance result contract and stable feature identities #18 feature attribution.
• A failure identifies affected feature IDs and shard/case rather than only failing a whole census artifact.
• Supported en-US/zh-CN parse/validation/emission/conversion paths are gated by semantic/normalized contracts.
• Unsupported/known-gap/inconclusive states remain visible in machine-readable output.
• The census can be assembled/exported for later client validation while focused tests remain independent and intact.