fix(docs): enhance formatting of ID validation rules in signed document metadata

- Standardize the presentation of ID validation rules across multiple documentation files to improve readability.
- Add missing newlines for better separation of criteria related to timestamp thresholds for future and past limits.
- Update the signed_doc.json specification to reflect the improved formatting standards.

Author: nathanbogale

docs/src/architecture/08_concepts/signed_doc/docs/brand_parameters.md

@@ -87,10 +87,11 @@ timestamp of when the document was created.
 #### [`id`](../metadata.md#id) Validation
 
 The document ID validation is performed based on timestamp thresholds:
+
 * If `future_threshold` is configured, the document `id` cannot be too far in the future from the
-  current time.
+current time.
 * If `past_threshold` is configured, the document `id` cannot be too far in the past from the
-  current time.
+current time.
 
 <!-- markdownlint-disable MD033 -->
 | Parameter | Value |

docs/src/architecture/08_concepts/signed_doc/docs/brand_parameters_form_template.md

@@ -92,6 +92,7 @@ timestamp of when the document was created.
 #### [`id`](../metadata.md#id) Validation
 
 The document ID validation is performed based on timestamp thresholds:
+
 * If `future_threshold` is configured, the document `id` cannot be too far in the future from the
 current time.
 * If `past_threshold` is configured, the document `id` cannot be too far in the past from the

docs/src/architecture/08_concepts/signed_doc/docs/campaign_parameters.md

@@ -88,6 +88,7 @@ timestamp of when the document was created.
 #### [`id`](../metadata.md#id) Validation
 
 The document ID validation is performed based on timestamp thresholds:
+
 * If `future_threshold` is configured, the document `id` cannot be too far in the future from the
   current time.
 * If `past_threshold` is configured, the document `id` cannot be too far in the past from the

docs/src/architecture/08_concepts/signed_doc/docs/campaign_parameters_form_template.md

@@ -92,6 +92,7 @@ timestamp of when the document was created.
 #### [`id`](../metadata.md#id) Validation
 
 The document ID validation is performed based on timestamp thresholds:
+
 * If `future_threshold` is configured, the document `id` cannot be too far in the future from the
   current time.
 * If `past_threshold` is configured, the document `id` cannot be too far in the past from the

docs/src/architecture/08_concepts/signed_doc/docs/category_parameters.md

@@ -88,6 +88,7 @@ timestamp of when the document was created.
 #### [`id`](../metadata.md#id) Validation
 
 The document ID validation is performed based on timestamp thresholds:
+
 * If `future_threshold` is configured, the document `id` cannot be too far in the future from the
   current time.
 * If `past_threshold` is configured, the document `id` cannot be too far in the past from the

docs/src/architecture/08_concepts/signed_doc/docs/category_parameters_form_template.md

@@ -92,6 +92,7 @@ timestamp of when the document was created.
 #### [`id`](../metadata.md#id) Validation
 
 The document ID validation is performed based on timestamp thresholds:
+
 * If `future_threshold` is configured, the document `id` cannot be too far in the future from the
   current time.
 * If `past_threshold` is configured, the document `id` cannot be too far in the past from the

docs/src/architecture/08_concepts/signed_doc/docs/comment_moderation_action.md

@@ -78,6 +78,7 @@ timestamp of when the document was created.
 #### [`id`](../metadata.md#id) Validation
 
 The document ID validation is performed based on timestamp thresholds:
+
 * If `future_threshold` is configured, the document `id` cannot be too far in the future from the
   current time.
 * If `past_threshold` is configured, the document `id` cannot be too far in the past from the

docs/src/architecture/08_concepts/signed_doc/docs/contest_ballot.md

@@ -89,6 +89,7 @@ timestamp of when the document was created.
 #### [`id`](../metadata.md#id) Validation
 
 The document ID validation is performed based on timestamp thresholds:
+
 * If `future_threshold` is configured, the document `id` cannot be too far in the future from the
   current time.
 * If `past_threshold` is configured, the document `id` cannot be too far in the past from the

docs/src/architecture/08_concepts/signed_doc/docs/contest_ballot_checkpoint.md

@@ -111,6 +111,7 @@ timestamp of when the document was created.
 #### [`id`](../metadata.md#id) Validation
 
 The document ID validation is performed based on timestamp thresholds:
+
 * If `future_threshold` is configured, the document `id` cannot be too far in the future from the
   current time.
 * If `past_threshold` is configured, the document `id` cannot be too far in the past from the

docs/src/architecture/08_concepts/signed_doc/docs/contest_delegation.md

@@ -148,6 +148,7 @@ timestamp of when the document was created.
 #### [`id`](../metadata.md#id) Validation
 
 The document ID validation is performed based on timestamp thresholds:
+
 * If `future_threshold` is configured, the document `id` cannot be too far in the future from the
   current time.
 * If `past_threshold` is configured, the document `id` cannot be too far in the past from the