Drop merged GraphQL schema for split files

Relay no longer needs a single merged schema.graphql: each project in
relay.config.json now reads the split graphql/*.graphql files directly
via `schema` (base.graphql) plus `schemaExtensions`. gqlgen already
consumed the split files, so the merge step only fed Relay and the
optional IDE GraphQL extension.

Remove the merge machinery (contrib/merge-graphql-schema.sh, the
RELAY_SCHEMAS make rules, and the gitignore entry) and drop the
graphql-config files (apps/trust/graphql.config.yml and the root
package.json graphql field); the Relay extension provides schema-aware
language features from relay.config.json on its own.

relay-compiler keeps generated artifacts in sync (stale ones are
removed automatically), so the relay npm script just runs the local
relay-compiler and the make target delegates to it.

Signed-off-by: Émile Ré <emile@probo.com>

contrib/claude/make.md

@@ -41,7 +41,7 @@ Individual codegen is driven by `go generate`:
 - `go generate ./pkg/server/api/mcp/v1` — MCP (mcpgen)
 - `go generate ./pkg/llm` — LLM model registry from OpenRouter (`make genmodels`)
 
-`make relay` merges split `.graphql` schema files and runs `relay-compiler`.
+`make relay` runs `relay-compiler`, which reads the split `.graphql` schema files directly (via each project's `schema` + `schemaExtensions` in `relay.config.json`) and keeps generated artifacts in sync (stale ones are removed automatically).
 
 ## Coverage
 

contrib/merge-graphql-schema.sh

@@ -1,44 +0,0 @@
-#!/bin/sh
-# Merge split GraphQL schema files into a single file for Relay.
-# Strips "type Mutation" and "extend type Mutation { ... }" blocks,
-# then appends a single "type Mutation { ... }" with all collected fields.
-#
-# Usage: merge-graphql-schema.sh <output> <graphql-dir>
-
-set -eu
-
-output="$1"
-graphql_dir="$2"
-base="$graphql_dir/base.graphql"
-
-mutation_fields=$(mktemp)
-schema_body=$(mktemp)
-trap 'rm -f "$mutation_fields" "$schema_body"' EXIT
-
-process_file() {
-    awk -v mf="$mutation_fields" '
-    /^type Mutation$/ { next }
-    /^(extend )?type Mutation \{/ { skip=1; depth=1; next }
-    skip {
-        if (/\{/) depth++
-        if (/\}/) { depth--; if (depth==0) { skip=0; next } }
-        if (skip) { print >> mf; next }
-    }
-    { print }
-    ' "$1"
-}
-
-{
-    process_file "$base"
-    for f in "$graphql_dir"/*.graphql; do
-        [ "$f" = "$base" ] && continue
-        process_file "$f"
-    done
-} > "$schema_body"
-
-{
-    cat "$schema_body"
-    printf '\ntype Mutation {\n'
-    cat "$mutation_fields"
-    printf '}\n'
-} > "$output"