feat(content)!: migrate celestial-v1 sky exposure

[zoeyrose]

Closes #181

Coordinate

• Repository/branch: atrinik/content@main
• Exact content commit: 2ab17667395451d196b1f6e566f770bfec656baa
• Predecessor source commit: 2a033cced813bdb191b8aad8a52effe010eb5f98
• Isolated scope/profile: issue-181-celestial-content / scope-issue-181-celestial-content
• No 1.x branch or checkout was created, modified, validated, or published.

Authored changes

• Migrated 3,639 maps to celestial_schema 1 with explicit absolute topology, reciprocal boundaries, regions, and sky disposition.
• Added the root world celestial profile: global 1/1 solar, season, and lunar rates; 672-game-day lunar period; day/night/moon/starlight colors; and brightness controls.
• Added inherited, scaled, and fixed fixture child regions covering independent solar/lunar rates, epochs, phases, colors, and brightness, including zero/dim/bright values.
• Added typed dynamic aperture variants and explicit closed/open transmissions, plus canonical multipart structural roles.
• Added fixtures: street, mixed-house-lower, mixed-house-upper, courtyard-shaft, multi-storey-bottom, multi-storey-middle, multi-storey-top, cave, and glass-grate.
• Preserved stacked topology as the ordinary indoor model; no ordinary indoor rectangles were hand-authored.
• Removed legacy outdoor; translated non-outdoor darkness through the documented one-time light table; ignored outdoor darkness as a lighting authority; preserved map_info as metadata only. World-maker style fragments under maps/styles remain excluded from v1 auto-topology migration.

Migration inventory

maps/celestial-migration-index.json records source/target digests, regions, sky disposition, boundaries, and stable aperture IDs:

• 2,720 open / 425 linked / 494 sealed maps
• 25,010 explicit horizontal boundaries
• 1,309 dynamic apertures
• 2,953 legacy outdoor dispositions removed
• 677 legacy darkness values translated
• 2,116 regionless maps made explicit world

Validation

• python3 tools/validate.py — 167 tests passed; 3,579 canonical archetype definitions complete.
• python3 tools/world_content_audit.py lights --check — 11,848 instances across 643 maps; zero unreviewed.
• git diff --check — passed.
• Custom topology audit — 3,639 maps; reciprocal links, explicit boundaries, absolute targets, legacy-field removal, and fixture rectangle rule passed.
• Exact compatible Classic target: atrinik/classic@12b1211dd44690476c3f060d7395ccc1250c85b4.
• Wrapper build/test using content 2ab176673 plus Classic 12b1211dd: 51/51 tests passed; world-maker startup completed without celestial structural errors.
• Exact-coordinate runtime smoke: topology issue-181-celestial-runtime reached ready state, server logs were clean, and the disposable topology was stopped.
• Deterministic scenario issue-181-celestial-scenario provisioned successfully from the migrated content profile.

Compatibility assumptions

• Classic v1 requires explicit absolute logical tile IDs and reciprocal boundary records because inferred topology is disabled for migrated maps.
• Structural roles come from archetypes; map-level structural overrides are removed. Multipart archetypes use uniform structural flags.
• Dynamic openings use dedicated celestial variants with typed closed/open transmission; static glass/grate fixtures use explicit typed transmission.
• The lunar baseline follows Classic fix(release): preserve nonclosing cross-repository references #191: 28 game days per synodic cycle unless a child profile explicitly overrides it; phase and below-horizon behavior remains runtime-owned.
• Content is authored on main and the derived Classic target is consumed only by the compatible parser/runtime coordinate above.

Remaining cutover dependencies

• Merge the prerequisite Classic parser/regional/lunar contract stack from refactor(content): align frozen authored source #187, refactor(release-lines): retire 1.x publication #189, and fix(release): preserve nonclosing cross-repository references #191 (with the design in feat(release): publish Classic target from main #186).
• Complete Classic propagation/consumption through classic#188 and classic#170, then update the consumer lock/manifest to this exact content coordinate.
• Keep this PR unmerged until those runtime and release gates are enabled; this PR does not merge anything.

[github-actions]

🎉 This PR is included in version 6.0.0 🎉

The release is available on:

• v6.0.0
• GitHub release

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