Mathias ca22df2d6a feat(ingestion): migrate to gitea.d-ma.be/mathias/mcp-chassis v0.1.0 ...

Second port of the MCP chassis (gitea-mcp was first, commit 658f4ba).
Closes the chassis-adoption loop on the two highest-LOC consumers.

Changes:
- Drop ingestion/internal/auth/ entirely (jwt.go + jwt_test.go +
  protected_resource.go + protected_resource_test.go) — chassis provides
  JWTValidator + ProtectedResourceHandler with identical semantics.
- Drop ingestion/internal/mcp/auth.go (BearerAuth function, ~65 LOC)
  and the integration test auth_test.go (~200 LOC) — chassis
  BearerMiddleware replaces it. Static-Bearer-or-Dex-JWT precedence and
  RFC 9728 resource_metadata challenge behavior preserved 1:1.
- cmd/server/main.go: import chassis as `chassisauth`, rewire the three
  call sites. Use realm="brain" in the BearerMiddleware call so a 401
  challenge identifies the resource as the brain MCP.

OAuth client_credentials handler (ingestion/internal/oauth) stays —
chassis v0.1.0 covers only the JWT path; OAuth flow is a candidate for
chassis v0.2.0 once a second MCP needs it (rule of three).

Net delta: -~330 LOC of duplicated auth code; +1 import; +1 GOPRIVATE
env requirement on dev machines (documented in the spike handoff
2026-05-22-mcp-chassis-spike.md).

task check green (lint + test + vet + govulncheck).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-05-22 10:43:11 +02:00

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