Change default port from 8080 to 7334 (NGIT on phone keypad)

- Update default bind address in src/config.rs to 127.0.0.1:7334
- Update all four critical config sources per AGENTS.md:
  - src/config.rs (code default and tests)
  - .env.example (development template)
  - docs/reference/configuration.md (user documentation)
  - nix/module.nix (NixOS deployment)
- Update all documentation examples and references:
  - README.md (with note about phone keypad mnemonic)
  - docs/how-to/*.md (deploy, prometheus-setup, test-compliance)
  - docs/explanation/*.md (architecture, comparison)
  - docs/learnings/grasp-audit.md

Port 7334 spells NGIT on a phone keypad, making it memorable and
project-specific.

All tests pass (336 lib tests + 51 integration tests).

7 files changed, 21 insertions, 21 deletions

diff --git a/docs/explanation/architecture.md b/docs/explanation/architecture.md
index d2a9bf7..e101425 100644
--- a/docs/explanation/architecture.md
+++ b/docs/explanation/architecture.md
@@ -580,7 +580,7 @@ RUN cargo build --release
 FROM debian:bookworm-slim
 RUN apt-get update && apt-get install -y git && rm -rf /var/lib/apt/lists/*
 COPY --from=builder /app/target/release/ngit-grasp /usr/local/bin/
-EXPOSE 8080
+EXPOSE 7334
 CMD ["ngit-grasp"]
 ```
 
diff --git a/docs/explanation/comparison.md b/docs/explanation/comparison.md
index 72e49a7..090e0eb 100644
--- a/docs/explanation/comparison.md
+++ b/docs/explanation/comparison.md
@@ -65,7 +65,7 @@ This document compares ngit-grasp (this project) with ngit-relay (the reference
 ┌────────────── ngit-grasp (Single Binary) ─────────────┐
 │                                                        │
 │  ┌──────────────────────────────────────────────────┐ │
-│  │         hyper HTTP Server (:8080)                 │ │
+│  │         hyper HTTP Server (:7334)                 │ │
 │  │  - WebSocket upgrade for Nostr relay              │ │
 │  │  - Git Smart HTTP handlers                        │ │
 │  │  - Landing page + metrics endpoint                │ │
diff --git a/docs/how-to/deploy.md b/docs/how-to/deploy.md
index 6fe8776..157e5f8 100644
--- a/docs/how-to/deploy.md
+++ b/docs/how-to/deploy.md
@@ -229,7 +229,7 @@ git ls-remote https://ngit.example.com/<npub>/<repo>.git
 
 ### Network
 - `bindAddress` - IP to bind to (default: "127.0.0.1")
-- `port` - Port to listen on (default: 8080)
+- `port` - Port to listen on (default: 7334)
 
 ### Storage
 - `dataDir` - Base directory for data (default: /var/lib/ngit-grasp-{name})
diff --git a/docs/how-to/prometheus-setup.md b/docs/how-to/prometheus-setup.md
index 741255b..53ec480 100644
--- a/docs/how-to/prometheus-setup.md
+++ b/docs/how-to/prometheus-setup.md
@@ -13,7 +13,7 @@ This guide shows how to configure Prometheus and Grafana to monitor ngit-grasp.
 First, verify that ngit-grasp is exposing metrics:
 
 ```bash
-curl http://localhost:8080/metrics
+curl http://localhost:7334/metrics
 ```
 
 You should see Prometheus-formatted metrics like:
@@ -41,7 +41,7 @@ services.prometheus = {
     {
       job_name = "ngit-grasp";
       static_configs = [{
-        targets = [ "localhost:8080" ];  # ngit-grasp bind address
+        targets = [ "localhost:7334" ];  # ngit-grasp bind address
       }];
       scrape_interval = "15s";
       metrics_path = "/metrics";
@@ -105,7 +105,7 @@ global:
 scrape_configs:
   - job_name: 'ngit-grasp'
     static_configs:
-      - targets: ['host.docker.internal:8080']  # or your ngit-grasp host
+      - targets: ['host.docker.internal:7334']  # or your ngit-grasp host
     metrics_path: /metrics
 ```
 
diff --git a/docs/how-to/test-compliance.md b/docs/how-to/test-compliance.md
index 370fb9a..8aa7ab1 100644
--- a/docs/how-to/test-compliance.md
+++ b/docs/how-to/test-compliance.md
@@ -184,7 +184,7 @@ nix develop -c cargo run
 
 # In another terminal, run audit tool
 cd grasp-audit
-nix develop -c cargo run -- --url ws://127.0.0.1:8080
+nix develop -c cargo run -- --url ws://127.0.0.1:7334
 ```
 
 ### For CI/CD
@@ -424,7 +424,7 @@ nix develop -c cargo test --test nip01_compliance --test nip34_announcements
 **For deep compliance check:**
 ```bash
 cd grasp-audit
-nix develop -c cargo run -- --url ws://127.0.0.1:8080
+nix develop -c cargo run -- --url ws://127.0.0.1:7334
 ```
 
 **Key points:**
diff --git a/docs/learnings/grasp-audit.md b/docs/learnings/grasp-audit.md
index f4620d9..c7eff16 100644
--- a/docs/learnings/grasp-audit.md
+++ b/docs/learnings/grasp-audit.md
@@ -110,7 +110,7 @@ use grasp_audit::client::AuditClient;
 use grasp_audit::audit::AuditConfig;
 
 let config = AuditConfig::isolated();
-let client = AuditClient::new("ws://localhost:8080", config).await?;
+let client = AuditClient::new("ws://localhost:7334", config).await?;
 
 // Create and send an event - cleanup tags are added automatically
 let event = client.event_builder()
diff --git a/docs/reference/configuration.md b/docs/reference/configuration.md
index 66f39f1..8b49297 100644
--- a/docs/reference/configuration.md
+++ b/docs/reference/configuration.md
@@ -25,20 +25,20 @@ Configuration is loaded at startup and validated before the server starts.
 
 **Description:** Address and port for the HTTP server to bind to  
 **Type:** String (IP:PORT format)  
-**Default:** `127.0.0.1:8080`  
+**Default:** `127.0.0.1:7334`  
 **Required:** No
 
 **Examples:**
 
 ```bash
 # Localhost only (development)
-NGIT_BIND_ADDRESS=127.0.0.1:8080
+NGIT_BIND_ADDRESS=127.0.0.1:7334
 
 # All interfaces (production)
-NGIT_BIND_ADDRESS=0.0.0.0:8080
+NGIT_BIND_ADDRESS=0.0.0.0:7334
 
 # IPv6
-NGIT_BIND_ADDRESS=[::1]:8080
+NGIT_BIND_ADDRESS=[::1]:7334
 
 # Custom port
 NGIT_BIND_ADDRESS=127.0.0.1:3000
@@ -64,7 +64,7 @@ NGIT_BIND_ADDRESS=127.0.0.1:3000
 ```bash
 NGIT_DOMAIN=gitnostr.com
 NGIT_DOMAIN=git.example.org
-NGIT_DOMAIN=localhost:8080  # Development only
+NGIT_DOMAIN=localhost:7334  # Development only
 ```
 
 **Used for:**
@@ -77,7 +77,7 @@ NGIT_DOMAIN=localhost:8080  # Development only
 **Notes:**
 
 - Must be accessible from the internet for production
-- Include port if non-standard (e.g., `localhost:8080`)
+- Include port if non-standard (e.g., `localhost:7334`)
 - Used in repository clone URLs: `https://{NGIT_DOMAIN}/{npub}/{repo}.git`
 
 ---
@@ -1007,13 +1007,13 @@ For development, create a `.env` file in the project root:
 
 ```bash
 # .env file example
-NGIT_DOMAIN=localhost:8080
+NGIT_DOMAIN=localhost:7334
 NGIT_OWNER_NPUB=npub1alice...
 NGIT_RELAY_NAME="Development Relay"
 NGIT_RELAY_DESCRIPTION="Local development instance"
 NGIT_GIT_DATA_PATH=./data/git
 NGIT_RELAY_DATA_PATH=./data/relay
-NGIT_BIND_ADDRESS=127.0.0.1:8080
+NGIT_BIND_ADDRESS=127.0.0.1:7334
 RUST_LOG=debug
 ```
 
@@ -1057,7 +1057,7 @@ NGIT_RELAY_NAME="GitNostr Public Relay"
 NGIT_RELAY_DESCRIPTION="Public GRASP relay for open source projects"
 NGIT_GIT_DATA_PATH=/var/lib/ngit-grasp/git
 NGIT_RELAY_DATA_PATH=/var/lib/ngit-grasp/relay
-NGIT_BIND_ADDRESS=0.0.0.0:8080
+NGIT_BIND_ADDRESS=0.0.0.0:7334
 RUST_LOG=info,ngit_grasp=debug
 ```
 
@@ -1076,13 +1076,13 @@ RUST_LOG=info,ngit_grasp=debug
 
 ```bash
 # Development .env
-NGIT_DOMAIN=localhost:8080
+NGIT_DOMAIN=localhost:7334
 NGIT_OWNER_NPUB=npub1test...
 NGIT_RELAY_NAME="Dev Relay"
 NGIT_RELAY_DESCRIPTION="Local development"
 NGIT_GIT_DATA_PATH=./data/git
 NGIT_RELAY_DATA_PATH=./data/relay
-NGIT_BIND_ADDRESS=127.0.0.1:8080
+NGIT_BIND_ADDRESS=127.0.0.1:7334
 RUST_LOG=debug
 ```
 
@@ -1124,7 +1124,7 @@ When multiple configuration sources exist:
 
 ```bash
 # .env file
-NGIT_BIND_ADDRESS=127.0.0.1:8080
+NGIT_BIND_ADDRESS=127.0.0.1:7334
 
 # Environment variable (overrides .env)
 NGIT_BIND_ADDRESS=0.0.0.0:3000 cargo run