refactor(tooling): T-1289 — economy-db becomes reach ledger

The sole generator of systems.db moves to tooling/domains/ledger/ and is
now `reach ledger import`. economy_import/ keeps its name (Rust comments in
server/src cite it); the entrypoint becomes service.py; schema_version.py
moves with the importer, which is where the version is defined.

The stamp survived the move, which is the thing that had to hold:

- generated_brands.toml is byte-identical (sha256 e748531…) before and after
- `reach check systems-db-stamp` reported STALE after the move (the registry
  saw it) and OK after the regen
- the dry-run carries every count and warning of the baseline transcript,
  and exit 2 — imported and stamped, coverage gate unmet — still reaches the
  caller through @command

`make regen-db` survives as a one-line delegate, per D-263's muscle-memory
clause: about fifty files name it, including the headers of generated wiki
TOMLs and the remedies the push gate prints. `make economy-db` is retired;
it ran `reach generate brands` before the import, which the import already
does as its first step.

economy_import.errors is reconciled as DOMAINS.md asked. ImportAborted stays
as internal rollback control flow and never reaches a caller; the service
converts it to a ReachError carrying the remedy.

regenerate_brands caught cargo_binary's ReachError, printed it and raised
ImportAborted, dropping the remedy. It runs before the import transaction
opens, so there is nothing to roll back — it now propagates.

Both sys.path bootstraps are gone; they existed only because the directory
was hyphenated. The step labels ran [1/10]…[10/13]…[17/19]; one 24-step
counter now drives the event phase and progress.

Stale pointers fixed on the way: MIGRATION_SQL has lived in
economy_import/migration.py since T-1067, but the asset-pipeline rule,
DEVOPS and the schema comments still sent readers to import_economics.py;
the rule and DEVOPS also still named the check scripts T-1281 retired.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/DEVOPS.md

@@ -239,14 +239,14 @@ make clean              # Remove build artifacts and .cache/ contents
 
 ```bash
 reach validate content    # Validate content YAML against JSON schemas
-make check-fact-ids       # Check fact_id references against knowledge catalogs
+reach check fact-ids       # Check fact_id references against knowledge catalogs
 ```
 
 ### Gauntlet Checklists
 
 ```bash
-make checklist-validate   # Validate checklist YAML against schema (standalone)
-make checklist-generate   # Validate + print per-room condition summary
+reach validate checklist --check   # Validate checklist YAML against schema (standalone)
+reach validate checklist   # Validate + print per-room condition summary
 ```
 
 Checklists live at `content/gauntlet/rooms/{room_id}/checklist.yaml` (per-room) and `content/gauntlet/cross_room_checks.yaml` (cross-room). Each condition is evaluable from an `ObserverSnapshot`.
@@ -268,7 +268,7 @@ the next regeneration.
 
 ### Generator
 
-`import_economics` (`tooling/economy-db/import_economics.py`) is the sole
+`import_economics` (`reach ledger import`, `tooling/domains/ledger/`) is the sole
 generator.  As its first step it runs the Rust `generate_brands` binary
 (via `core.process.cargo_binary`) to refresh `generated_brands.toml`, then imports
 economics data and the atlas index (names-only city pool; geometry tables stay
@@ -288,7 +288,7 @@ After every successful non-dry-run, the generator writes a row to the `meta` tab
 registry is the `GENERATOR_SOURCES` dict in `tooling/generator_sources.py`.
 
 ```bash
-make check-systems-db    # Verify the stamp is fresh (exit 1 = stale)
+reach check systems-db-stamp    # Verify the stamp is fresh (exit 1 = stale)
 ```
 
 ### Making a DB change
@@ -299,7 +299,7 @@ make check-systems-db    # Verify the stamp is fresh (exit 1 = stale)
 4. Commit with `chore(db): regen systems.db — <reason>`
 
 For schema changes, also update `server/data/systems-schema.sql` and add migration DDL
-to `MIGRATION_SQL` in `import_economics.py`.
+to `MIGRATION_SQL` in `tooling/domains/ledger/economy_import/migration.py`.
 
 See `.claude/rules/asset-pipeline.md` for the full rule set.