fix(legacy-stage): purge 9-stage enum keys from rank tables and stale copy

L-001 hunt landed these:

  - src/lib/services/clients.service.ts — stageRank used pre-refactor
    9-stage names exclusively (`contract_signed`, `deposit_10pct`, …).
    Every modern 7-stage interest fell to rank 0, making client-list
    "most-progressed deal" sort effectively random. Modern values now
    own the canonical ranks; legacy aliases map to their 7-stage
    equivalents so historical audit data still sorts.

  - src/lib/services/berth-recommender.service.ts — STAGE_ORDER had
    the same 9-stage shape. LATE_STAGE_THRESHOLD pointed at the (now
    nonexistent) `deposit_10pct` slot. Reworked to the 7-stage scale;
    threshold now at `deposit_paid` (5).

  - Stale comments referencing `deposit_10pct` in schema (clients,
    financial) and client-archive services updated to current copy.

  - Smart-archive dialog rendered `i.pipelineStage` as raw enum; now
    routes through `stageLabelFor` (the new helper added with A2).

Test fixture updates: berth-recommender.test.ts numeric inputs
re-mapped to the new 7-stage scale (eoi_signed=5 → eoi=3, etc.).
1373/1373 vitest pass.

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

src/lib/db/schema/users.ts

@@ -18,10 +18,10 @@ export type RolePermissions = {
     edit: boolean;
     delete: boolean;
     change_stage: boolean;
-    /** Bypass the canTransitionStage table (e.g. mark a contract_signed
-     *  deal as completed without going through deposit_10pct first when
-     *  the data was entered out of order). Audit-logged with the reason
-     *  the rep gives. Sales-team-restricted. */
+    /** Bypass the canTransitionStage table (e.g. jump a deal straight to
+     *  Contract without going through Deposit Paid first when the data
+     *  was entered out of order). Audit-logged with the reason the rep
+     *  gives. Sales-team-restricted. */
     override_stage: boolean;
     generate_eoi: boolean;
     export: boolean;