feat(repos): multi-machine path support via host_paths

Adds a JSONB column `host_paths` to managed_repos mapping
hostname → absolute local path. Fixes the consistency-checker
failure when the same repo lives at different paths on different
machines (e.g. /home/worsch/marki-docx on the workstation vs
/home/tegwick/marki-docx on custodiancore).

Changes:
- Migration g4b5c6d7e8f9: adds host_paths JSONB (default {})
- Model: host_paths Mapped[dict] column
- Schemas: host_paths in RepoRead; new RepoPathRegister schema
- Router: POST /repos/{slug}/paths/ — merges one host entry
- consistency_check.py: resolve_repo_path() prefers host_paths
  [hostname] over local_path; --repo-path CLI override added
- MCP: update_repo_path(slug, path, host?) tool
- Makefile: register-path target; REPO_PATH passthrough on
  check-consistency and fix-consistency targets
- TOOLS.md: documents update_repo_path

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Makefile

@@ -1,4 +1,4 @@
-.PHONY: install install-cli db db-tools migrate seed api dashboard check start clean register-project validate-adr add-domain rename-domain add-repo list-repos cleanup-stale tunnel tunnel-daemon tunnel-loop tunnel-status tunnel-stop install-hooks install-hooks-all gitea-inventory
+.PHONY: install install-cli db db-tools migrate seed api dashboard check start clean register-project validate-adr add-domain rename-domain add-repo list-repos register-path cleanup-stale tunnel tunnel-daemon tunnel-loop tunnel-status tunnel-stop install-hooks install-hooks-all gitea-inventory
 
 COMPOSE = docker compose -f infra/docker-compose.yml --env-file .env
 
@@ -135,6 +135,14 @@ rename-domain:
 	  -H "Content-Type: application/json" \
 	  -d "{\"new_slug\": \"$(NEW_SLUG)\", \"new_name\": \"$(NEW_NAME)\"}" | python3 -m json.tool
 
+## Register this machine's local path for a repo: make register-path REPO=marki-docx PATH=/home/tegwick/marki-docx
+register-path:
+	@test -n "$(REPO)" || (echo "ERROR: REPO is required. Usage: make register-path REPO=<slug> PATH=<path>"; exit 1)
+	@test -n "$(PATH)" || (echo "ERROR: PATH is required. Usage: make register-path REPO=<slug> PATH=<path>"; exit 1)
+	curl -sf -X POST "http://127.0.0.1:8000/repos/$(REPO)/paths/" \
+	  -H "Content-Type: application/json" \
+	  -d "{\"host\": \"$$(hostname)\", \"path\": \"$(PATH)\"}" | python3 -m json.tool
+
 ## List repos for a domain: make list-repos DOMAIN=railiance
 list-repos:
 	@test -n "$(DOMAIN)" || (echo "ERROR: DOMAIN is required."; exit 1)
@@ -166,15 +174,19 @@ validate-adr:
 	@test -n "$(REPO)" || (echo "ERROR: REPO is required. Usage: make validate-adr REPO=<path> [DOMAIN=<slug>]"; exit 1)
 	uv run python scripts/validate_repo_adr.py "$(REPO)" $(if $(DOMAIN),--domain "$(DOMAIN)",)
 
-## Check a single repo for ADR-001 consistency: make check-consistency REPO=the-custodian
+## Check a single repo for ADR-001 consistency: make check-consistency REPO=the-custodian [REPO_PATH=/override]
 check-consistency:
 	@test -n "$(REPO)" || (echo "ERROR: REPO is required. Usage: make check-consistency REPO=<slug>"; exit 1)
-	uv run python scripts/consistency_check.py --repo "$(REPO)" $(if $(API_BASE),--api-base "$(API_BASE)",)
+	uv run python scripts/consistency_check.py --repo "$(REPO)" \
+	  $(if $(API_BASE),--api-base "$(API_BASE)",) \
+	  $(if $(REPO_PATH),--repo-path "$(REPO_PATH)",)
 
-## Check and auto-fix a single repo: make fix-consistency REPO=the-custodian
+## Check and auto-fix a single repo: make fix-consistency REPO=the-custodian [REPO_PATH=/override]
 fix-consistency:
 	@test -n "$(REPO)" || (echo "ERROR: REPO is required. Usage: make fix-consistency REPO=<slug>"; exit 1)
-	uv run python scripts/consistency_check.py --repo "$(REPO)" --fix $(if $(API_BASE),--api-base "$(API_BASE)",)
+	uv run python scripts/consistency_check.py --repo "$(REPO)" --fix \
+	  $(if $(API_BASE),--api-base "$(API_BASE)",) \
+	  $(if $(REPO_PATH),--repo-path "$(REPO_PATH)",)
 
 ## Check all registered repos for ADR-001 consistency
 check-consistency-all: