feat: add CI/CD pipeline, production Dockerfile, and deployment architecture

- Add production Dockerfile with bun build --compile, multi-stage Alpine build
- Add .dockerignore
- Swap bcrypt -> bcryptjs (pure JS, no native addons)
- Add programmatic migrations on startup via drizzle migrator
- Add /v1/version endpoint with APP_VERSION baked in at build time
- Add .gitea/workflows/ci.yml (lint + test with postgres/valkey services)
- Add .gitea/workflows/build.yml (version bump, build, push to registry)
- Update CLAUDE.md and docs/architecture.md to remove multi-tenancy
- Add docs/deployment.md covering DOKS + ArgoCD architecture

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

bun.lock

@@ -66,7 +66,8 @@
         "@fastify/multipart": "^9.4.0",
         "@fastify/rate-limit": "^10.3.0",
         "@lunarfront/shared": "workspace:*",
-        "bcrypt": "^6",
+        "@types/bcryptjs": "^3.0.0",
+        "bcryptjs": "^3.0.3",
         "drizzle-orm": "^0.38",
         "fastify": "^5",
         "fastify-plugin": "^5",
@@ -75,7 +76,6 @@
         "zod": "^4",
       },
       "devDependencies": {
-        "@types/bcrypt": "^5",
         "@types/node": "^22",
         "drizzle-kit": "^0.30",
         "pino-pretty": "^13",
@@ -530,7 +530,7 @@
 
     "@types/babel__traverse": ["@types/babel__traverse@7.28.0", "", { "dependencies": { "@babel/types": "^7.28.2" } }, "sha512-8PvcXf70gTDZBgt9ptxJ8elBeBjcLOAcOtoO/mPJjtji1+CdGbHgm77om1GrsPxsiE+uXIpNSK64UYaIwQXd4Q=="],
 
-    "@types/bcrypt": ["@types/bcrypt@5.0.2", "", { "dependencies": { "@types/node": "*" } }, "sha512-6atioO8Y75fNcbmj0G7UjI9lXN2pQ/IGJ2FWT4a/btd0Lk9lQalHLKhkgKVZ3r+spnmWUKfbMi1GEe9wyHQfNQ=="],
+    "@types/bcryptjs": ["@types/bcryptjs@3.0.0", "", { "dependencies": { "bcryptjs": "*" } }, "sha512-WRZOuCuaz8UcZZE4R5HXTco2goQSI2XxjGY3hbM/xDvwmqFWd4ivooImsMx65OKM6CtNKbnZ5YL+YwAwK7c1dg=="],
 
     "@types/date-arithmetic": ["@types/date-arithmetic@4.1.4", "", {}, "sha512-p9eZ2X9B80iKiTW4ukVj8B4K6q9/+xFtQ5MGYA5HWToY9nL4EkhV9+6ftT2VHpVMEZb5Tv00Iel516bVdO+yRw=="],
 
@@ -614,7 +614,7 @@
 
     "baseline-browser-mapping": ["baseline-browser-mapping@2.10.12", "", { "bin": { "baseline-browser-mapping": "dist/cli.cjs" } }, "sha512-qyq26DxfY4awP2gIRXhhLWfwzwI+N5Nxk6iQi8EFizIaWIjqicQTE4sLnZZVdeKPRcVNoJOkkpfzoIYuvCKaIQ=="],
 
-    "bcrypt": ["bcrypt@6.0.0", "", { "dependencies": { "node-addon-api": "^8.3.0", "node-gyp-build": "^4.8.4" } }, "sha512-cU8v/EGSrnH+HnxV2z0J7/blxH8gq7Xh2JFT6Aroax7UohdmiJJlxApMxtKfuI7z68NvvVcmR78k2LbT6efhRg=="],
+    "bcryptjs": ["bcryptjs@3.0.3", "", { "bin": { "bcrypt": "bin/bcrypt" } }, "sha512-GlF5wPWnSa/X5LKM1o0wz0suXIINz1iHRLvTS+sLyi7XPbe5ycmYI3DlZqVGZZtDgl4DmasFg7gOB3JYbphV5g=="],
 
     "binary-extensions": ["binary-extensions@2.3.0", "", {}, "sha512-Ceh+7ox5qe7LJuLHoY0feh3pHuUDHAcRUeyL2VYghZwfpkNIy/+8Ocg0a3UuSoYzavmylwuLWQOf3hl0jjMMIw=="],
 
@@ -928,10 +928,6 @@
 
     "natural-compare": ["natural-compare@1.4.0", "", {}, "sha512-OWND8ei3VtNC9h7V60qff3SVobHr996CTwgxubgyQYEpg290h9J0buyECNNJexkFm5sOajh5G116RYA1c8ZMSw=="],
 
-    "node-addon-api": ["node-addon-api@8.7.0", "", {}, "sha512-9MdFxmkKaOYVTV+XVRG8ArDwwQ77XIgIPyKASB1k3JPq3M8fGQQQE3YpMOrKm6g//Ktx8ivZr8xo1Qmtqub+GA=="],
-
-    "node-gyp-build": ["node-gyp-build@4.8.4", "", { "bin": { "node-gyp-build": "bin.js", "node-gyp-build-optional": "optional.js", "node-gyp-build-test": "build-test.js" } }, "sha512-LA4ZjwlnUblHVgq0oBF3Jl/6h/Nvs5fzBLwdEF4nuxnFdsfajde4WfxtJr3CaiH+F6ewcIB/q4jQ4UzPyid+CQ=="],
-
     "node-releases": ["node-releases@2.0.36", "", {}, "sha512-TdC8FSgHz8Mwtw9g5L4gR/Sh9XhSP/0DEkQxfEFXOpiul5IiHgHan2VhYYb6agDSfp4KuvltmGApc8HMgUrIkA=="],
 
     "normalize-path": ["normalize-path@3.0.0", "", {}, "sha512-6eZs5Ls3WtCisHWp9S2GUy8dqkpGi4BVSz3GaqiE6ezub0512ESztXUwUB6C6IKbQkY2Pnb/mD4WYojCRwcwLA=="],