Add datashare support to the template repo

[msf]

Adds the validated datashare macro and post-hook to dune-dbt-template, plus an opt-in example model and repo-local setup guide. This keeps datashare support discoverable in the public template without syncing dev or PR schemas by default.

• add the ALTER TABLE ... EXECUTE datashare(...) macro and wire it into dbt_project.yml
• add one datashare-enabled example model plus monitoring and manual sync docs
• restrict the automatic post-hook to prod so temporary schemas stay local

[cursor]

PR Summary

Medium Risk
Adds a new global post-hook that can execute ALTER TABLE ... EXECUTE datashare(...) on prod runs when models opt in via meta.datashare, which could impact production tables if misconfigured. Scope is otherwise contained to a new macro, docs, and a template model.

Overview
Adds opt-in Datashare synchronization support to the dbt template.

Introduces a new macro (datashare_trigger_sync() and datashare_trigger_sync_operation) that generates/executes ALTER TABLE ... EXECUTE datashare(...) for table and incremental models with meta.datashare.enabled: true, and wires it into dbt_project.yml as a global post-hook (guarded to only run on the prod target).

Adds a datashare-enabled incremental template model plus schema docs/tests, and updates README.md with a new Datashares section linking to the new docs/dune-datashares.md setup/monitoring/cleanup guide.

^{Written by Cursor Bugbot for commit 3e37243. Configure here.}

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

Bugbot Autofix prepared a fix for the issue found in the latest run.

• ✅ Fixed: Inconsistent string coercion for full_refresh parameter
  • Added the same string coercion logic (full_refresh is string and full_refresh | lower in ['true', '1', 'yes', 'y']) to the is_full_refresh assignment on line 110, matching the existing pattern used for dry_run on line 128.

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Preview (327bd0c901)

diff --git a/macros/dune_dbt_overrides/datashare_table_sync_post_hook.sql b/macros/dune_dbt_overrides/datashare_table_sync_post_hook.sql
--- a/macros/dune_dbt_overrides/datashare_table_sync_post_hook.sql
+++ b/macros/dune_dbt_overrides/datashare_table_sync_post_hook.sql
@@ -107,7 +107,7 @@
     {%- set node_config = node.config if node.config is mapping else {} -%}
     {%- set materialized = node_config.get('materialized', 'view') -%}
     {%- set table_name = node.alias if node.alias is not none else node.name -%}
-    {%- set is_full_refresh = materialized == 'table' or full_refresh is sameas true -%}
+    {%- set is_full_refresh = materialized == 'table' or full_refresh is sameas true or (full_refresh is string and full_refresh | lower in ['true', '1', 'yes', 'y']) -%}
 
     {%- set sql = _datashare_table_sync_sql(
         schema_name=node.schema,

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