feat: Add guild charters and task boards for various components

- Introduced guild charters for Scanner Deno, PHP, Ruby, Native, WebService, Java, Surface.Env, Surface.FS, Surface.Secrets, Surface.Validation, UI, Zastava Observer, Zastava Webhook, Zastava Core, and Plugin Platform.
- Each charter outlines the mission, scope, required reading, and working agreements for the respective guilds.
- Created task boards for Surface.Env, Surface.FS, Surface.Secrets, Surface.Validation, and Zastava components to track progress and dependencies.
- Ensured all documents emphasize determinism, offline readiness, security, and integration with shared Surface libraries.

src/Scanner/StellaOps.Scanner.Worker/TASKS.md

@@ -2,3 +2,6 @@
 
 | ID | Status | Owner(s) | Depends on | Description | Exit Criteria |
 |----|--------|----------|------------|-------------|---------------|
+| SCANNER-SURFACE-01 | TODO | Scanner Worker Guild | SURFACE-FS-02 | Persist Surface.FS manifests after analyzer stages, including layer CAS metadata and EntryTrace fragments. | Integration tests prove cache entries exist; telemetry counters exported. |
+| SCANNER-ENV-01 | TODO | Scanner Worker Guild | SURFACE-ENV-02 | Replace ad-hoc environment reads with `StellaOps.Scanner.Surface.Env` helpers for cache roots and CAS endpoints. | Worker boots with helper; misconfiguration warnings documented; smoke tests updated. |
+| SCANNER-SECRETS-01 | TODO | Scanner Worker Guild, Security Guild | SURFACE-SECRETS-02 | Adopt `StellaOps.Scanner.Surface.Secrets` for registry/CAS credentials during scan execution. | Secrets fetched via shared provider; legacy secret code removed; integration tests cover rotation. |