* refactor(server): extract the artist-alias routes into routers/artist_aliases.py (R3)
Second router, picked by router_scan.py: the artist-aliases / Tidy-up (P4) group
ranks at 0 monkeypatch.setattr targets and 0 helpers to relocate. 5 routes
(list/set/merge/delete aliases + raw-artist picker), all meta_db-only.
Bodies verbatim; only @app.<m> -> @router.<m> and meta_db -> appstate.meta_db.
include_router mounts at the original site; full 143-route table identical to
origin/main (paths, methods, order). No test retargets: test_artist_alias drives
via TestClient(server.app) + server.meta_db, neither of which moved.
Verified: pyflakes clean on the router; no new undefined in server.py; JSONResponse
still used in server.py (not dead); pytest 2398 passed (18 in test_artist_alias);
packaging guard green; eslint 0; boot smoke drives all 5 routes end-to-end
(set ACDC->AC/DC, read back, 400 on missing fields, delete).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* docs: credit both router extractions in the size-exemptions rationale (CodeRabbit)
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Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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