feat(querier): plan-time body-literal candidate matcher (RFC 0044 slice 1)

[jensholdgaard]

Summary

RFC 0044 slice 1 — the pure plan-time half of the template arm. body_match::body_literal_candidates resolves a body == literal against the tenant's TemplateRegistry:

• tokenized with the miner's own tokenizer (the only way the inversion is sound against the §3.3 reconstruction invariant),
• unified position-wise per (template_id, version) — Fixed byte-equal, Wildcard captures the implied parameter values in order,
• deterministic output (sorted), and a tokenizer-rejected literal (embedded NUL) yields the empty set — exact, because the parse-failure ingest path always retains such bodies for the physical arm.

The result is deliberately a candidate superset: separators and overflow-spilled parameter values are per-record, so exact equality settles at scan time inside candidate-admitted row groups only — that split is what keeps the arm prunable. The scan-time exactness + two-arm compile is slice 2; nothing user-visible changes yet.

Verification

6 co-located unit tests (zero-param, parameterized capture, multi-template determinism, arity/fixed mismatches, independent versions, NUL). fmt clean, clippy 0 warnings, querier suite green.

🤖 Generated with Claude Code

https://claude.ai/code/session_01Qtny6z6cA74xPZa4qRhk4F

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📥 Commits

Reviewing files that changed from the base of the PR and between 8a31f61 and 1dea812.

📒 Files selected for processing (2)

• crates/ourios-querier/src/body_match.rs
• crates/ourios-querier/src/lib.rs

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[Copilot]

Pull request overview

This PR introduces the first (plan-time) building block for RFC 0044’s template-arm compilation in the querier: resolving a body == <literal> predicate into a deterministic, version-qualified set of template candidates plus implied wildcard parameters, using the miner’s tokenizer to preserve reconstruction soundness.

Changes:

• Add body_match::body_literal_candidates to unify a body literal against (template_id, version) → tokens from the tenant TemplateRegistry, producing a deterministic candidate set.
• Add focused unit tests covering exact match, wildcard capture order, determinism, mismatch cases, version independence, and tokenizer-rejected literals (embedded NUL).
• Export the new module from ourios-querier’s crate root.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
crates/ourios-querier/src/lib.rs	Exposes the new body-match functionality from the crate root.
crates/ourios-querier/src/body_match.rs	Implements plan-time literal→template candidate unification + unit tests.

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