Repo maintenance: schema tightening, fork URLs, issue-manager fix, Dependabot, Python 3.13

[sherrmann]

Summary

Five maintenance fixes from a full repo audit, one commit each:

1. Fix issue-manager.yml waiting delay and update to 0.8.0 — the "waiting" delay was 60400 seconds (~17 hours) while its own close message says "after 7 days"; corrected to 604800. Also bumps tiangolo/issue-manager 0.5.1 → 0.8.0.
2. Point README and Pages site at this fork — the browse URL (sherrmann.github.io/SpoolmanDB) is what gets copied into Spoolman's config, so it must reference this fork's Pages deployment rather than upstream's. Adds a note that the fork carries reviewed but not-yet-merged upstream PR data.
3. Add Dependabot config — watches github-actions weekly, so future runtime deprecations (like the recent Node 20 → 24 cycle) arrive as automatic PRs.
4. Reject unknown keys in schemas — additionalProperties: false at every object level of filaments.schema.json and materials.schema.json, so CI catches typo'd or unvalidated keys instead of silently ignoring them. This immediately surfaced a real pre-existing bug: filaments/ratrig.json used spool_material instead of spool_type (fixed here). Validation is now stricter than upstream's, so upstream PRs pulled over in the future may need small fixes first.
5. Bump CI Python to 3.13 — 3.11 is in security-only maintenance; the compile script runs clean on 3.13 (verified with warnings-as-errors).

Compiled-ID note

Fixing the RatRig typo changes its four compiled IDs from the _n suffix to _p, since the spool type is now recognized. Any Spoolman spools referencing those exact IDs will need re-linking.

Validation

• check-jsonschema passes on materials.json and all filaments/* against the tightened schemas
• scripts/compile_filaments.py compiles cleanly, no duplicate IDs
• All modified YAML files parse

🤖 Generated with Claude Code

https://claude.ai/code/session_01YXFsv1PV9wVWGgwXGz2guJ

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