Group the sources into aliased modules and lint with the published plugins (#23)

Groups the flat `src/` into cohesive modules and turns on the published lint plugins. No behavior change.

## Module layout

Each module is a direct `src/` subfolder with an `index.ts` barrel and a `#` alias in `package.json` `imports` (layer order, top first):

| Alias | Files |
| --- | --- |
| `#prepare` | `index.ts` (the prepare phase entry point) |
| `#run` | `index.ts` (the run phase entry point) |
| `#post` | `index.ts` (the post phase entry point), `post.ts`, `post.test.ts` |
| `#agents` | `auth.ts`, `opencode.ts` (Codex / Claude Code sign-in, OpenCode args and output) |
| `#processes` | `child.ts`, `isolation.ts` |
| `#runtime` | `runtime.ts`, `credentials.ts` |
| `#profiles` | `profiles.ts` |
| `#common` | `errors.ts`, `json.ts` |
| `#testing` | `index.ts` (unchanged) |

Every top-level entry of `src/` is an aliased module folder. Tests stay next to their code as `*.test.ts`. Each phase's `index.ts` is its entry point, and `action.yml` now runs `node src/<phase>/index.ts`. The post phase's logic moved to `src/post/post.ts` so its test can import it; `index.ts` keeps the env reading and the `import.meta.main` call. `run`'s prompt URL is now `../../prompt.md`. `scripts/protect-source.sh` now copies `src/` recursively (it used to copy `src/*.ts` only), and the workflow test checks that module files get staged too.

## Lint plugins

- New devDependencies: `eslint-plugin-explicit-types@^0.6.1` and `eslint-plugin-import-structure@^0.10.2`, both in `jsPlugins`. The lockfile comes from a real `npm install`.
- Enabled configs: `importStructure.configs.modules`, `explicitTypes.configs.concrete`, `explicitTypes.configs.absence`.
- **explicit-types `naming` is off** (the other app repos turn it on). Its `upper-snake-string-unions` and `no-upper-snake-object-keys` rules fire on wire tokens this repo doesn't choose: profile types `"claude" | "codex" | "opencode"` from `profiles.json`, failure reasons posted to Gitea, Gitea's `"new" | "old"` side, and environment variable names such as `PATH`. Satisfying them would change behavior or need opt-outs. This is logged as an open question for the user.

Lint fixes, all type-level:
- `Pick<BotProfile, "type" | "model">` became a named `ProfileIdentity` interface that `BotProfile`, `ProfileFailure`, and `RuntimeProfile` extend. `RuntimeOutcome` is now `RuntimeSuccess | RuntimeFailure`.
- Inline object types became named interfaces.
- `Record<string, string>` env maps became `NodeJS.ProcessEnv`. `JsonObject` and the verdict table became `NodeJS.Dict<…>`.
- `T | undefined` locals and returns became `T | null` with matching checks. `typeof fetch` became a `Fetcher` type.
- Claude's result fields are held in camelCase (`isError`, `apiErrorStatus`) after parsing, because `id-match` rejects snake_case interface members.
- Duplicate import sources are merged (`import-structure/no-duplicate-import-source`).

## Verification

- `vp check`: clean.
- `vp test`: 61 passed and 5 skipped as a normal user. All 66 passed as root in `node:24-bookworm`.
- Each phase (`node src/<phase>/index.ts`) run from a `protect-source.sh` copy loads its full alias graph under Node.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Reviewed-on: #23
Reviewed-by: bot <noreply@capsulizers.com>
Co-authored-by: Danny Kim <temeddix@gmail.com>
Co-committed-by: Danny Kim <temeddix@gmail.com>

.agents/memory/bot-agents-child-processes.md

@@ -1,5 +1,5 @@
 ---
-description: Child processes use plain node:child_process spawn (explicit stdio, uid/gid, whole env); src/child.ts has exitCode (128+signo) and echo; no execFile maxBuffer
+description: Child processes use plain node:child_process spawn (explicit stdio, uid/gid, whole env); src/processes/child.ts has exitCode (128+signo) and echo; no execFile maxBuffer
 ---
 
 Every call site calls `spawn` from `node:child_process` itself, with
@@ -15,7 +15,7 @@ everything explicit:
 - No `execFile`/`exec`: their `maxBuffer` (1 MiB) kills a chatty child. Read
   piped streams incrementally instead.
 
-`src/child.ts` holds what the call sites share:
+`src/processes/child.ts` holds what the call sites share:
 
 - **`exitCode(child)`**: call it right after `spawn`. It settles on `exit`
   (not `close`, which a daemonized grandchild can hold open), maps a signal to
@@ -28,9 +28,9 @@ Tests use `spawnSync` for short commands.
 
 Other port details:
 
-- **`src/errors.ts`** `isNotFound` checks `ENOENT` (file) or `ESRCH` (process).
+- **`src/common/errors.ts`** `isNotFound` checks `ENOENT` (file) or `ESRCH` (process).
 - Temporary files are an exclusive `wx` create with mode `0600`.
-- `src/json.ts` holds type guards used instead of `as` casts on parsed JSON.
+- `src/common/json.ts` holds type guards used instead of `as` casts on parsed JSON.
 - `process` and `Buffer` must come from `node:` imports:
   `no-restricted-globals` in `scripts/project-lint.ts` enforces it
   ([[lint-parity-never-shrinks]]).