chore: restructure SRS for asset catalog and tag model redesign (dcy-001/002, REQ-001~008)

Architecture Redesign (May 19, 2026):
- Separate admin-managed asset catalog from user portfolios
- Eliminate portfolio as asset definition; clarify portfolio as user position
- Introduce new asset_catalog + portfolio structure

Discovery Documents:
- dcy-001: asset-catalog-and-user-portfolio-model — admin asset management and user portfolio separation
- dcy-002: tag-ownership-and-applicability-policy — tag model implementation strategy

New Requirements (REQ-001~008):
- REQ-001: tags master table introduction (Data, Proposed)
- REQ-002: assets.tag_ids UUID[] column addition (Data, Proposed)
- REQ-003: portfolios.tag_ids and portfolio_tags removal (Data, Proposed)
- REQ-004: tags master HTTP API (Interface, Proposed)
- REQ-005: tag apply/remove HTTP API (Interface, Proposed)
- REQ-006: portfolio_tags data migration (Migration, Proposed)
- REQ-007: pfhub tag CLI commands (Interface, Proposed)
- REQ-008: tag model baseline docs update (Documentation, Proposed)

Cleanup:
- Remove archived SRS documents (REQ-001~029 old structure)
- Remove archived batch documentation (BAT-001~010)
- Remove archived discovery documents (dcy-001~006 old structure)
- Remove archived release documentation (REL-001~006)

Data Model Updates:
- Add Deployment category to SRS structure
- Add Data category for new data model requirements
- Update app/cli/core/utils.py for new tag handling

Documentation:
- Create new SRS index with consolidated requirement structure
- Update docs/discovery/index.md with new discovery references
- Migrate from requirement-centric to domain-model-centric organization

Rationale:
- Existing single-portfolio model lacks admin catalog governance
- New asset catalog enables central management of tradeable symbols
- Tag system supports user-driven asset organization and discovery
- Cleaner separation of concerns between admin operations and user trading

app/cli/core/utils.py

@@ -121,22 +121,16 @@ def print_portfolio_detail(console: Console, detail: PortfolioDetailResponse) ->
     console.print(ledger_table)
 
 
-def print_user_table(console: Console, users: list[UserResponse]) -> None:
-    table = Table(title="Users", expand=True)
-    table.add_column("ID", style="cyan", no_wrap=True)
-    table.add_column("Username", no_wrap=True)
-    table.add_column("Email")
-    table.add_column("Created At", no_wrap=True)
-    table.add_column("Updated At", no_wrap=True)
-    for user in users:
-        table.add_row(
-            user.id,
-            user.username,
-            user.email or "N/A",
-            user.created_at.isoformat(timespec="seconds") if user.created_at else "N/A",
-            user.updated_at.isoformat(timespec="seconds") if user.updated_at else "N/A",
+def print_user_list(console: Console, users: list[UserResponse]) -> None:
+    for i, user in enumerate(users):
+        if i:
+            console.print()
+        console.print(f"[bold]{user.username}[/bold]  [dim]{user.id}[/dim]")
+        console.print(f"  email {user.email or 'N/A'}")
+        console.print(
+            f"  created {user.created_at.isoformat(timespec='seconds') if user.created_at else 'N/A'}"
+            f"  updated {user.updated_at.isoformat(timespec='seconds') if user.updated_at else 'N/A'}"
         )
-    console.print(table)
 
 
 def print_user_detail(console: Console, user: UserResponse) -> None:
@@ -274,7 +268,7 @@ def render_output(console: Console, output_format: str, payload: Any, *, empty_m
             print_portfolio_list(console, payload)
             return
         if all(isinstance(item, UserResponse) for item in payload):
-            print_user_table(console, payload)
+            print_user_list(console, payload)
             return
         if all(isinstance(item, CommentResponse) for item in payload):
             print_comment_table(console, payload)