fix(spec): prefix bundle-relative resource paths with leading slash

SPEC.md

@@ -481,7 +481,7 @@ case it is not a path. Each path-valued field accepts:
 A `references/` subdirectory conventionally mirrors external material, run
 instructions, or code as first-class concepts within the bundle. Sources,
 executors, and attesters commonly point into it (for example
-`references/attesters/revenue.py`). It is a naming convention, not a
+`/references/attesters/revenue.py`). It is a naming convention, not a
 requirement.
 
 ---
@@ -617,10 +617,10 @@ runtime: bigquery
 parameters:
   - { name: year, type: integer, required: true }
 executor:
-  resource: references/skills/run-on-bq.md
+  resource: /references/skills/run-on-bq.md
   receipt: [job_id, executed_sql, result]
 attester:
-  resource: references/attesters/revenue.py
+  resource: /references/attesters/revenue.py
 generated: { by: reference_agent/gemini-2.5-pro, at: 2026-06-20T22:53:05Z }
 verified: { by: human:ahormati, at: 2026-06-25T09:00:00Z }
 stale_after: 2026-09-23T00:00:00Z
@@ -654,7 +654,7 @@ Provide the computation in one of two ways:
 
 ```yaml
 runtime: bigquery
-computation: references/computations/lib/revenue.sql
+computation: /references/computations/lib/revenue.sql
 parameters:
   - { name: year, type: integer, required: true }
 ```

bundles/acme_retail/computations/gross-margin-period.md

@@ -8,23 +8,23 @@ parameters:
   - { name: period_start, type: date, required: true }
   - { name: period_end, type: date, required: true }
 executor:
-  resource: skills/run-on-bq.md
+  resource: /skills/run-on-bq.md
   receipt: [job_id, executed_sql, result]
 attester:
-  resource: attesters/sql_equality.py
+  resource: /attesters/sql_equality.py
 generated: { by: reference_agent/gemini-2.5-pro, at: 2026-06-30T14:00:00Z }
 verified:
   - { by: human:jsmith@acme, at: 2026-07-01T09:00:00Z }
 status: stable
 stale_after: 2026-12-31T00:00:00Z
 sources:
   - id: margin-standard
-    resource: policies/margin-standard.md
+    resource: /policies/margin-standard.md
     title: Cost Allocation & Margin Standard (FY2026)
     author: human:jsmith@acme
     last_modified: 2026-06-15T00:00:00Z
   - id: revenue-policy
-    resource: policies/revenue-recognition.md
+    resource: /policies/revenue-recognition.md
     title: Revenue Recognition Policy (FY2026)
     author: human:jsmith@acme
     last_modified: 2026-06-15T00:00:00Z

bundles/acme_retail/computations/revenue-ytd.md

@@ -7,23 +7,23 @@ runtime: bigquery
 parameters:
   - { name: year, type: integer, required: true }
 executor:
-  resource: skills/run-on-bq.md
+  resource: /skills/run-on-bq.md
   receipt: [job_id, executed_sql, result]
 attester:
-  resource: attesters/sql_equality.py
+  resource: /attesters/sql_equality.py
 generated: { by: reference_agent/gemini-2.5-pro, at: 2026-06-30T14:00:00Z }
 verified:
   - { by: human:jsmith@acme, at: 2026-07-01T09:00:00Z }
 status: stable
 stale_after: 2026-12-31T00:00:00Z
 sources:
   - id: revenue-policy
-    resource: policies/revenue-recognition.md
+    resource: /policies/revenue-recognition.md
     title: Revenue Recognition Policy (FY2026)
     author: human:jsmith@acme
     last_modified: 2026-06-15T00:00:00Z
   - id: orders-table
-    resource: tables/orders.md
+    resource: /tables/orders.md
     title: Customer Orders (BigQuery table)
     author: team:data-platform
     last_modified: 2026-07-01T00:00:00Z

bundles/acme_retail/metrics/gross-margin.md

@@ -14,12 +14,12 @@ not:
     instead: "revenue minus full COGS (product cost + inbound fulfillment + outbound shipping + payment fees)"
 sources:
   - id: margin-standard
-    resource: policies/margin-standard.md
+    resource: /policies/margin-standard.md
     title: Cost Allocation & Margin Standard (FY2026)
     author: human:jsmith@acme
     last_modified: 2026-06-15T00:00:00Z
   - id: revenue-policy
-    resource: policies/revenue-recognition.md
+    resource: /policies/revenue-recognition.md
     title: Revenue Recognition Policy (FY2026)
     author: human:jsmith@acme
     last_modified: 2026-06-15T00:00:00Z

bundles/acme_retail/metrics/revenue.md

@@ -10,7 +10,7 @@ status: stable
 stale_after: 2026-12-31T00:00:00Z
 sources:
   - id: revenue-policy
-    resource: policies/revenue-recognition.md
+    resource: /policies/revenue-recognition.md
     title: Revenue Recognition Policy (FY2026)
     author: human:jsmith@acme
     last_modified: 2026-06-15T00:00:00Z

bundles/acme_retail/tables/orders.md

@@ -17,7 +17,7 @@ sources:
     usage_count: 1240
     last_modified: 2026-06-15T00:00:00Z
   - id: revenue-policy
-    resource: policies/revenue-recognition.md
+    resource: /policies/revenue-recognition.md
     title: Revenue Recognition Policy (FY2026)
     author: human:jsmith@acme
     last_modified: 2026-06-15T00:00:00Z