feat(core): add provider-neutral records filing contract

2026-08-06 01:43:08 +02:00
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+# Records Filing Contract
+
+Core exposes a small provider-neutral contract for filing exact source
+revisions into an institutional record. Core does not own records semantics,
+source-object authorization, or source bytes. `govoplan-records` owns filing
+orchestration and chronology; each source module owns resolution of its exact
+revision.
+
+## Capability Names
+
+- `records.filing` is supplied by the enabled Records module.
+- `records.source.<module>` is supplied by an enabled source module, for
+  example `records.source.files` or `records.source.cases`.
+
+Callers discover capabilities through the module registry. They must not
+import optional source-module internals.
+
+## Exact Source Identity
+
+`RecordSourceLocator` identifies one tenant, source module, resource type,
+resource ID, and immutable source revision. A source provider must:
+
+1. reject cross-tenant resolution;
+2. require a non-empty purpose;
+3. re-evaluate the caller's current module and object authorization;
+4. resolve exactly the requested revision, never a mutable "current" alias;
+5. return safe display/provenance metadata and a SHA-256 digest when the source
+   has stable bytes or a canonical snapshot;
+6. fail closed when the revision is missing, quarantined, corrupt, or no longer
+   authorized.
+
+Historical Records browsing never revives historical access rights. The
+source's current authorization decision remains authoritative when filing.
+
+## Filing Semantics
+
+`RecordFilingRequest` binds the exact source to a record, purpose, filing
+reason, relationship, institutional context, and idempotency key. Records must
+persist source identity and resolution evidence together with the filing actor,
+represented capacity, valid time, recorded time, and immutable chronology.
+
+An idempotency key may replay only an identical request. A conflicting reuse
+must fail. Filing does not transfer ownership of source content and must not
+silently copy mutable source state.
+
+## Versioning
+
+The Python DTOs and protocols live in `govoplan_core.core.records`. The
+manifest interface `records.filing` starts at `1.0.0`. Incompatible DTO or
+behavior changes require a new interface version and release impact analysis;
+additional optional metadata remains backward compatible.
+
+## Initial Providers
+
+- Files resolves an exact managed `FileVersion`, verifies current Files access
+  and blob integrity, and returns its stored content digest.
+- Cases resolves an exact immutable case revision after current case access and
+  returns a digest of the canonical revision snapshot.
+
+Provider-specific selection UI belongs to the source module. The generic
+Records dialog remains a diagnostic/manual fallback for exact identifiers.