[blaipr]

The 0.35 work: configuration as item files, connectors, federation push, and the fixes from a pre-release sweep.

• Breaking: item files. The configuration is one item per file under a typed key, AWX style; a 0.34 directory is converted at startup (staged, validated, backed up, never half-written).
• Breaking: connectors. What a source said about its script moved to a connectors item that many sources share; reference keys lost their _id suffix.
• Federation push: the central pushes the topology map to its edges, redacted, with the same key the map was read with; server.url and server.name.
• New reads: a source's single group, project revisions and credentials, peer pull ages.
• Fixes: migration naming collisions, number-looking values kept verbatim, browser sessions refused for pushes, sessions revoked by key name, temp copies cleaned on read-only mounts.
• UI: the image ships unified-ui 0.2.0.

Every entry, with who a breaking change affects, is in CHANGELOG.md under Unreleased.

Local checks: cargo fmt --check, cargo clippy --all-targets -- -D warnings, cargo test, and the changelog guard.