Scaffold the Before-M1 repo skeleton

Stand up the modular-monolith skeleton per docs/V1_BUILD_PLAN.md: one .NET 10
solution with web + worker hosts sharing seven interface-bounded module projects,
PostgreSQL 17 + pgvector via EF Core 10, a React 19 + Vite SPA built into wwwroot,
and Docker Compose for one-command local dev. Skeleton only — no feature code.

Architecture
- One project per module (OrgBoard, Identity, Skills, Assembler, Governance,
  Memory, Integrations); each is its own assembly so non-public types (entities,
  DbContext) are invisible across modules at compile time.
- TeamUp.Bootstrap is the only library that references all modules; both hosts
  reference only Bootstrap. SharedKernel/Infrastructure never reference modules.
- IModule seam: Register(...) runs in both hosts; MapEndpoints(...) only in web.
- PlatformDbContext owns the pgvector extension + the seven module schemas
  (InitialPlatform migration); MigrationRunner applies it then any module context.
- One image, two roles selected by RUN_MODE at the Docker entrypoint.

Verified
- dotnet build green (nullable + warnings-as-errors).
- ArchitectureTests 8/8 — reflection-based boundary rules (no module -> module,
  -> Infrastructure, -> Bootstrap, or -> host references).
- IntegrationTests 10/10 — Testcontainers boots the host against real pgvector:
  migration applies, vector extension + 7 schemas exist, /health 200, every
  /api/<module>/ping 200, /openapi/v1.json served.
- client builds clean (Vite 6 — pinned for Node 22.3.0; Vite 8 needs Node >=22.12).

Packages and base images route through the Nexus mirror (mirror.soroushasadi.com),
reachable from Iran when nuget.org / Docker Hub / MCR are not. CI is intentionally
deferred to a later session.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.editorconfig

@@ -0,0 +1,47 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+indent_style = space
+indent_size = 4
+
+[*.{json,js,jsx,ts,tsx,yml,yaml,css,html}]
+indent_size = 2
+
+[*.{csproj,props,targets,xml}]
+indent_size = 2
+
+[*.md]
+trim_trailing_whitespace = false
+
+[*.cs]
+# Namespaces
+csharp_style_namespace_declarations = file_scoped:warning
+# usings
+dotnet_sort_system_directives_first = true
+csharp_using_directive_placement = outside_namespace:warning
+# var / modern C#
+csharp_style_var_when_type_is_apparent = true:suggestion
+csharp_prefer_braces = true:suggestion
+csharp_style_prefer_primary_constructors = true:suggestion
+dotnet_style_require_accessibility_modifiers = for_non_interface_members:warning
+# Prefer readonly
+dotnet_style_readonly_field = true:warning
+
+# Quiet a few analyzer rules that are noisy for a young codebase / skeleton.
+# CA1515: types can be internal — intentionally relaxed (public module/contract surface).
+dotnet_diagnostic.CA1515.severity = none
+# CA1812: internal class never instantiated — false positives on DI-resolved types.
+dotnet_diagnostic.CA1812.severity = none
+# CA2007: ConfigureAwait — not needed in ASP.NET Core / worker (no sync context).
+dotnet_diagnostic.CA2007.severity = none
+# CA1848 / CA1873: LoggerMessage-delegate perf rules — opt-in perf, not worth enforcing in V1.
+dotnet_diagnostic.CA1848.severity = none
+dotnet_diagnostic.CA1873.severity = none
+
+# EF Core migrations are tool-generated — don't style-police them.
+[**/Migrations/*.cs]
+generated_code = true