docs: Update governance to include new Domain Tech Council nomination process for new verticals

DOMAIN_TECH_COUNCIL_CHARTER.md

@@ -0,0 +1,55 @@
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+
+# Domain Tech Council (DTC) Charter Template
+
+## Problem Statement
+
+Describe the specific market gap, technical bottleneck, or industry
+fragmentation this DTC proposal aims to resolve for the domain.
+
+## UCP Strategic Fit
+
+Explain why the Universal Commerce Protocol is the right fit for this domain.
+
+## Use Case Roadmap
+
+Outline the phased approach for modeling use cases within UCP.
+
+- **Phase 1 (MVP):** [Insert immediate use cases]
+- **Phase 2 (Expansion):** [Insert mid-term use cases]
+- **Phase 3 (Long-term):** [Insert long-term use cases]
+
+## Platforms
+
+List the initial set of platforms committing to consume UCP capabilities.
+
+- [Platform Name 1]
+- [Platform Name 2]
+
+## Businesses
+
+List the initial set of businesses ready to implement capabilities via UCP.
+
+- [Business Name 1]
+- [Business Name 2]
+
+## Commitment
+
+By submitting this charter, the named platforms and businesses formally
+commit to a long-term collaboration focused on developing and actively
+promoting the industry-wide adoption of the primitives proposed by this
+Domain Tech Council (DTC).

GOVERNANCE.md

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 - Responsible for governance, overall health and adoption of the protocol.
 - GC serves as the ultimate owner of all UCP assets. Google
-  acts as the custodian of the UCP.dev domain, holding and managing it solely
-  for the benefit of the Council and the partnership’s collective interests.
+  acts as the custodian of the UCP.dev domain, holding and managing it to
+  foster adoption of UCP.
 - Includes a total of 5 members.
 - Includes 1 permanent member from each founding organization (Google &
   Shopify) each having 1 vote (total 2 votes).
@@ -84,9 +84,24 @@
   Google holds proxy vote for all open seats until Dec 2028 to facilitate rapid
   early stage growth & adoption of the protocol.
 - Can add/remove TC members via simple majority vote.
+- Can elect new members to GC based on their ability to drive protocol
+  adoption, represent key industry domains, and demonstrate commitment to open
+  protocols.
 - May choose to review and veto TC decision or recommendation.
 - Decisions are made with a majority vote.
 
+## Process for nominating new Domain Tech Councils (DTC)
+
+- Submit a DTC charter nomination (using the
+  [DTC charter template](DOMAIN_TECH_COUNCIL_CHARTER.md)) as a new issue
+  in the [UCP Issues
+  tracker](https://github.com/Universal-Commerce-Protocol/ucp/issues).
+- GC reviews DTC charter and approves/rejects DTC nomination.
+- GC opens up nomination for inducting DTC members, using the process
+  specified in [TC_ELECTIONS.md](TC_ELECTIONS.md).
+- GC elects and announces the new DTC members, finalizes the DTC
+  composition and updates the governance documentation.
+
 ## Communication
 
 To ensure the protocol remains open and agnostic, all governance activities must